MEMORANDUM OPINION
FLAUM, District Judge:
The instant complaint is before the court on plaintiffs’ motion for provisional class certification. Fed.R.Civ.P. 23(c). Plaintiffs allege violations of section 10(b) of the Securities Exchange Act of 1934, 15 U.S.C. § 78j(b) and rule 10b-5, promulgated thereunder, 17 C.F.R. § 240.10b-5. Plaintiffs are purchasers of G. D. Searle & Co. common stock. The gravamen of plaintiffs’ complaint is that defendants failed to disclose that three drugs which defendants manufacture had carcinogenic qualities and that while defendants entertained doubts about the marketability and safety of these drugs, they made false material declarations concerning them.1 For the reasons stated below, the court grants plaintiffs’ motion and certifies a provisional class.
[342]*342Solely for the purpose of this motion, the court takes the following substantive allegations of the complaint as true.2 Defendants had knowledge of the carcinogenic properties of the three drugs, Flagyl, Aldactone and Aldactazide, by March 21, 1973. Smce as early as 1960, defendants entertained serious doubts as to the safety of Aldactazide and Aldactone.3 They authorized toxicity studies which indicated that Aldactone may have been carcinogenic. Defendants designed toxicity tests to minimize the possibility of finding that the drugs caused tumors in test animals. They also altered certain test data to conceal these properties. On March 21, 1973 defendants received a 78-week study conducted by a pathologist, Dr. Jacqueline Mauro, which concluded that both drugs had significant carcinogenic properties. Mauro’s conclusions were later confirmed by another study. With respect to Flagyl, defendants first became aware that the drug had significant carcinogenic properties as early as 1972.4 A study of the drug by two University of Nebraska doctors, Rustía and Shubek, in 1971 found Flagyl to be a carcinogen.5 Two earlier studies, one conducted under Searle sponsorship, indicated the drug had such properties.
The possible dangers of these drugs were publicly disclosed at various times from 1972 to 1975. The Rustia-Shubek study of Flagyl was published in the Journal of the National Cancer Institute in March, 1972. During 1974, a private citizens’ group, the Health Research Group, petitioned the Federal Drug Administration [FDA] to withdraw its approval of Flagyl.6 Beginning in January, 1973, at the behest of the FDA, Searle included in its labelling of Flagyl the results of the testing indicating the drug’s association with both malignant and nonmalignant tumors. This label was also published in the Physicians Desk Reference. On May 30, 1975, the FDA caused to be published in the Federal Register references to the conclusions of the Mauro study. A June 3, 1975 New York Times article expressly referred to these conclusions as reasons for decline in the - Searle stock. This article does not state that Flagyl, Aldactone and Aldactazide were carcinogenic. A Wall Street Journal article which appeared on the same day makes reference to the Mauro study and a proposed FDA investigation as a reason for heavy trading in the stock. A July 11, 1975 Wall Street Journal article disclosed the possible carcinogenic properties of the drugs and the FDA accusation that Searle destroyed, altered and withheld research data.
Plaintiff Hochschuler, a Dallas physician, purchased 200 shares of Searle common stock June 3, 1975. He purchased in joint tenancy with his wife. At the time of his purchase, he had been informed by his broker that the price of the stock was depressed because of reports of the adverse studies. Plaintiff Gordon purchased 300 shares of Searle stock June 7,1973. Gordon purchased pursuant to a “put” option agreement.7 He sold the option April 3, 1973.
In sum, plaintiffs allege defendants participated in a scheme to artificially inflate the price of Searle common stock. Plaintiffs contend that at a time when doubt existed as to the safety of these drugs, the defendants chose to emphasize their safety and their importance to the continued prof[343]*343itability of Searle. Plaintiffs further argue that defendants, in spite of their doubts, emphasized the drugs’ acceptance in the medical community in certain annual reports and other financial statements. Additionally, plaintiffs allege defendants failed to disclose the following: the destruction or alteration of test data in order to conceal the carcinogenic and tumorgenic qualities of the drugs; the concealment of certain flaws in the testing procedures; the filing of summary reports to the FDA which were inconsistent with raw test data.
Plaintiffs seek to represent a class of all persons who purchased G. D. Searle common stock from March 21, 1973 to July 10, 1975 and who did not sell their stock during the period. Defendants maintain a number of obstacles bar certification of the proposed class. They contend the motion must be denied because plaintiffs’ claim does not meet the typicality and adequacy of representation requirements of rule 23(a). They further argue that certification is inappropriate because the class contains antagonistic members. Finally, defendants argue plaintiffs have failed to show common issues predominate under rule 23(b)(3).
After a brief review of certain threshold principles, the court will consider whether plaintiffs have met the prerequisites of rule 23(a) and then consider whether the issues of law and fact predominate and the class action is a superior mode of adjudicating the lawsuit under rule 23(b)(3).
Plaintiffs seek certification of a class under rule 23(b)(3). In making the class determination in a securities case, the court recognizes that the requirements of rule 23 must be liberally construed and that the rule’s policy is to favor class actions. King v. Kansas City Southern Industries, Inc., 519 F.2d 20 (7th Cir. 1975); Helfand v. Cenco, Inc., 80 F.R.D. 1 (N.D.Ill.1977); Sley v. Jamaica Water & Utilities, Inc., 77 F.R.D. 391 (E.D.Pa.1977). Consequently, the court does not deny the class motion because of the existence of minor deviations in the class and the court “should indulge every presumption to maintain this suit as a class action.” Appleton Electric Co. v. Ad vance-United Expressways, 494 F.2d 126, 137 (7th Cir. 1974). This liberal policy is based upon the belief that class actions can deter corporate wrongdoing and encourage legally mandated disclosures. Blackie v. Barrack, 524 F.2d 891 (9th Cir. 1975), cert. denied, 429 U.S. 816, 97 S.Ct. 57, 50 L.Ed.2d 75 (1976); Green v. Wolf Corp., 406 F.2d 291 (2d Cir. 1968). The class action aids small individual claimants who would otherwise be reluctant to bring their claims due to the expense of the litigation. Hawaii v. Standard Oil, 405 U.S. 251, 266, 92 S.Ct. 885, 31 L.Ed.2d 184 (1972).
Nothing stated above should be construed to suggest the defendants shoulder a burden to demonstrate the absence of a class. The burden of demonstrating compliance with rule 23 is on the plaintiff. Amswiss International Corp. v. Heublein, Inc., 69 F.R.D. 663 (N.D.Ga.1975). However, in making the certification decision, the court makes no inquiry into the merits of suit. Eisen v. Carlisle & Jacqueline, 417 U.S. 156, 94 S.Ct. 2140, 40 L.Ed.2d 732 (1974). The court will therefore first consider whether plaintiffs have complied with the prerequisites under rule 23(a) and then make the independent consideration of whether there has been compliance under rule 23(b)(3).
I Numerosity
The proposed class plainly meets the first requirement that its membership is so numerous that joinder is impracticable. The proposed class members are alleged to number over 1000 and to be geographically diverse, living throughout the United States and abroad. See generally 3B Moore’s Federal Practice ¶ 56.07, at 23-273 (2d ed. 1978) (a number exceeding 1000 is obviously sufficient). See, e. g., Swanson v. American Consumer Industries, Inc., 415 F.2d 1326, 1333 n. 9 (7th Cir. 1969) (class of forty).
II Commonality
Under subsection (a)(2) of the rule, plaintiffs must demonstrate that common questions of law or fact are held by all members of the class. The instant action [344]*344alleges a common scheme of nondisclosure beginning sometime before 1972 and continuing until July 11, 1975. Where the same scheme operates on a class of open market purchasers over an extended length of time, the requisite of subsection (a)(2) has been met. See Green v. Wolf Corp., 406 F.2d 291 (2d Cir. 1968), cert. denied, 395 U.S. 977, 89 S.Ct. 2131, 23 L.Ed.2d 766 (1969); Lewis v. Capital Mortgage Investments, 78 F.R.D. 295 (D.Md.1977); Kaufman v. Lawrence, 76 F.R.D. 397 (S.D.N.Y.1977). Here, the class members are bound by the existence, nature and materiality of the misleading statements and omissions. This view was expressed in Blackie v. Barrack, 524 F.2d at 902:
Confronted with a class of purchasers allegedly defrauded over a period of time by similar misrepresentations, courts have taken the common sense approach that the class is united by a common interest in determining whether a defendant’s course of conduct is in its broad outlines actionable, which is not defeated by slight differences in class members’ positions and that the issue may be profitably tried in one suit.
Ill Typicality
Defendants contend that neither of the plaintiffs can represent the class because their claims are not typical. For a claim, to be typical under rule 23(a)(3), plaintiffs must demonstrate that a course of conduct by the defendants exists which presents substantial questions common to all members of the class notwithstanding the existence of some conflict of interest. Thus, plaintiffs meet this requirement when they show that the same allegedly unlawful conduct affected the named plaintiffs and the class members. “Factual variations are not fatal to a proposed class when the claims arise out of the same remedial and legal theory.” Wofford v. Safeway Stores, Inc., 78 F.R.D. 460, 488 (N.D.Cal. 1978); Sley v. Jamaica Water & Utilities, Inc., 77 F.R.D. 391, 395 (E.D.Pa.1977). Professor Moore states a two-part test for typicality: 1) the interest of the plaintiff and the class he seeks to represent are not antagonistic; 2) there is a common nucleus of operative fact in plaintiff’s claim and the claim he seeks to represent. 3B Moore’s Federal Practice ¶ 23.06-2 (2d ed. 1977). See, e. g., Sullivan v. Chase Investment Services, 79 F.R.D. 246, 257-58 (N.D.Cal.1978); Wofford v. Safeway Stores, Inc., 78 F.R.D. 460, 488-90 (N.D.Cal.1978); Greenspan v. Brassler, 78 F.R.D. 130, 131-33 (S.D.N.Y.1978); Lewis v. Capital Mortgage Investments, 78 F.R.D. 295, 301-02 (D.Md. 1977). Both plaintiffs have alleged they are victims of the same scheme of nondisclosure and misrepresentation concerning the three drugs. To that extent, they have met the typicality requirement.
The defendants contend, however, that both plaintiffs’ claims are not typical because they are subject to unique defenses. The court will initially address the arguments against Hochschuler. As to him, three contentions are raised: that he made his purchase with knowledge of the nondisclosed facts; that because of his knowledge he will minimize the importance of the facts known to him in order to maximize his own recovery; that he failed to join his wife, a co-owner of the stock, as a party.8
Pointing to certain statements Hochschuler made in his deposition, defendants contend he purchased his stock with actual knowledge of certain facts the complaint alleges to be nondisclosed. Consequently, his claim is argued to be atypical by virtue of this unique defense. Citing Koos v. First National Bank of Peoria, 496 F.2d 1162, [345]*3451164 (7th Cir. 1974), defendants assert Hochschuler is not a proper class representative. because the issue of his knowledge is “an arguable defense unique to the named plaintiff or small subclass.” See also Zenith Labs, Inc. v. Carter-Wallace, Inc., 530 F.2d 508 (3d Cir.), cert. denied, 429 U.S. 828, 97 S.Ct. 85, 50 L.Ed.2d 91 (1976); Greenspan v. Brassler, 78 F.R.D. 130, 132 (S.D.N.Y.1978) (“the putative representative is subject to unique defenses that will unnecessarily prejudice the class’s probability of success”). The court finds defendants’ argument unpersuasive on two grounds. First, Hochschuler’s statement reflects only a minimal awareness of the FDA investigation, even accepting the construction defendants would apply to it.9 As the court reads his statement in relation to the alleged fraud, it is unclear that Hoehschuler had any knowledge whatever of any scheme. The question of his actual knowledge is more appropriately deferred to the trial of the action. Second, the question of Hochschuler’s knowledge merely raises an issue of reliance which is indisputedly applicable to the entire class membership.
In reaching this conclusion, the court finds Koos distinguishable. The plaintiffs in Koos moved to represent a class of individuals who were borrowers of allegedly usurious loans. The court of appeals affirmed the dismissal of the case and the denial of the class action on the ground that the named plaintiffs did not fall within the Illinois usury statute under which they brought their claim. They therefore could not represent borrowers whose loans did in fact fall within the scope of the law. Two recent cases in which the court was confronted with an issue analogous to the one at bar certified the class, distinguishing Koos. In Hurwitz v. R. B. Jones Corp., 76 F.R.D. 149 (W.D.Mo.1977), plaintiffs brought an action in part under rule 10b-5 alleging certain corporate officers made misleading statements in connection with a tender offer. Defendants argued that plaintiffs’ claim was atypical on the ground that plaintiffs had not relied on the allegedly false statements and omissions in the offering circular. The court certified the class, noting that a determination of reliance was better left for the merits of the case. Distinguishing Koos, the court noted that there was in fact nothing unique about a defense of lack of reliance since that question was applicable to the entire class. Similarly, in Kesler v. Hynes & Howes Real Estate, Inc., 66 F.R.D. 43 (S.D.Iowa 1975), a nondisclosure case brought under rule lob-5, plaintiffs disclosed in their depositions that they had either not received certain prospectuses which contained misleading information or, having received them, they failed to read them or having read them, they did not understand them. The court certified the class. It noted that “to deny class certification based upon a fine-line assessment of reliance in terms of each plaintiff’s respective situation would constitute too much of an excursion into the merits of the case.” Id. at 48. In distinguishing Koos, the court stated:
Here there is no question that each of the named plaintiffs was a party to a security transaction falling within the scope of the 1933 and 1934 Acts. If a live issue existed as to whether the plaintiffs had purchased “securities” from the defendants, see, e. g., Miller v. Central [346]*346Chinchilla Group, Inc., 494 F.2d 414 (8th Cir. 1974), Koos might apply. Its principles do not control this fact situation, however. Here, unlike Koos, reliance will be pertinent to the claims of all plaintiffs.
Id, at 49 n. 1.
At this juncture, the extent of Hochschuler’s knowledge is hotly contested. His deposition testimony is ambiguous. There is virtually no showing of any knowledge of a problem with Flagyl. The New York Times article does not report that defendants conceived and implemented a scheme of nondisclosure beginning in 1972. The court therefore cannot conclude at this point that the question of his knowledge will become a major focus of the litigation. In the event that it does so, the court is impowered to decertify the class or designate appropriate subclasses.10
Defendants further contend that Hochschuler’s claim is atypical because he purchased the stock jointly with his wife. Defendants’ cite no authority for the proposition that the absence of Mrs. Hochschuler as a named representative renders his claim, as a joint owner, atypical. Professor Moore notes that “when persons who are needed for a just adjudication under Rule 19 are so numerous that joinder of all is impracticable then a class action is warranted, and a proper representative or representatives may sue or be sued on behalf of the class.” 3A Moore’s Federal Practice, ¶ 19.21, at 19-362-363 (2d ed. 1977). The fact that Hochschuler chose to purchase as a co-owner with his wife in no way suggests that his investment decision is any different than that of a person who purchases alone. In either case, the person would be influenced by the same material nondisclosures. Further, there is no showing that Hochschuler by virtue of his status has an antagonistic interest to the class.11
Defendants raise two principal contentions concerning the typicality of Gordon’s claim. First, defendants argue that the unique nature of the form of Gordon’s purchase renders his claim atypical. Second, they contend his claim is atypical because the majority of the alleged misrepresentations and omissions occurred subsequent to the date of Gordon’s stock acquisition. The court views both claims to be without merit and finds his claim to be typical.
On April 3, 1973 Gordon sold a “put” option on G. D. Searle common stock.12 On June 7, 1973 the stock was put to Gordon and pursuant to his contract, he purchased 100 shares of stock. Defendants contend this mode of purchase rendered his claim atypical because the actual stock acquisition was involuntary and because the sale of a put is a highly distinct investment decision from a purchase of a security. The fact that the ultimate acquisition of the [347]*347stock was involuntary is immaterial to the requirement. “[Differences in the amount of damage, the size or manner of purchase, the nature of the purchaser, and even the specific document influencing the purchase will not render a claim atypical in most securities cases.” Newberg, Class Actions § 8816, at 850 (1977) [hereinafter cited as Newburg]. Gordon sold the put voluntarily, allegedly ignorant of the alleged scheme. At the relevant sale date, his decision was voluntary. The fact that the sale of a put involves different considerations does not render Gordon’s claim atypical. The put option seller must prove the same case as the common stock purchaser would. Cf. Clark v. Cameron-Brown Co., 72 F.R.D. 48, 53 (M.D.N.C.1976) (“shareholders and warrant holders . . . share a complete identity of interest in establishing the allegations of the amended complaint. . . No apparent antagonisms have arisen from the respective claims of the shareholders and warrant holders”). See also Handwerger v. Ginsburg, CCH Fed. Sec.L.Rep. ¶ 94, 934 (S.D.N.Y.), appeal dismissed, 519 F.2d 1339 (2d Cir. 1975); Fischer v. Kletz, 41 F.R.D. 377 (S.D.N.Y.1966). But see Weisberg v. APL Corp., 76 F.R.D. 233 (E.D.N.Y.1977). Focusing on the commonality of interest with respect to the allegations of the complaint, it is apparent that his claim is typical.13
Defendants further contend that Gordon’s interest is atypical because of the date of his purchase. Defendants argue Gordon has no motivation to prove any non-disclosures after the date of his purchase in June, 1973. The date of Gordon’s purchase does not render his claim atypical. Defendants’ argument on this point appears to be premised on the fact that if Gordon fails to prove his case he will not be motivated to prove fraud after the date of his purchase. The complaint alleges a common course of conduct conceived long prior to his purchase and continued long after. Taking that allegation as true, as the court is required to at this point in the litigation, plaintiff will be able to show he was injured by the common scheme which injured subsequent purchasers. In such a situation, the overwhelming weight of authority holds a plaintiff may represent subsequent purchasers. Elkind v. Liggett & Myers, Inc., 77 F.R.D. 708, 712 (S.D.N.Y.1977) so held:
This case is more akin to those which have allowed the plaintiff to represent those who purchased shares after he had on the ground that, in alleging a common course of conduct over a long period of time, the plaintiff would have sufficient incentive to duly develop facts which occurred after the individual plaintiff had purchased his shares.
See also Lewis v. Capital Mortgage Investments, 78 F.R.D. 295 (D.Md.1977); Clark v. Cameron-Brown Co., 72 F.R.D. 48 (M.D.N.C. 1976); Weiss v. Drew National Corp., 71 F.R.D. 429 (S.D.N.Y.1976); Byrnes v. IDS Realty, 70 F.R.D. 608 (D.Minn.1976); Tucker v. Arthur Andersen & Co., 67 F.R.D. 468 (S.D.N.Y.1975); Aboudi v. Daroff, 65 F.R.D. 388 (S.D.N.Y.1974); Bisgeier v. Fotomat Corp., 62 F.R.D. 113 (N.D.Ill.1972); Siegel v. Realty Equities Corp., 54 F.R.D. 420 (S.D.N.Y.1972); Weiss v. Tenney, 47 F.R.D. 283 (S.D.N.Y.1969).14 The court ac[348]*348cordingly finds that at this time Gordon’s claim meets the typicality requirement.
IV Adequacy of Representation
In general, the adequacy of representation requirement of rule 23(a)(4) is met where the interests of the representative coincide with the other class members and where plaintiff and his attorney will vigorously prosecute the action. See Wetzel v. Liberty Mutual Insurance Co., 508 F.2d 239, 247 (3d Cir. 1975); Sullivan v. Chase Investment Services, 79 F.R.D. 246 (N.D.Cal.1978); Lewis v. Capital Mortgage Investments, 78 F.R.D. 295 (D.Md.1977). See also Newburg § 8818b. The class representative is only qualified if his interest in proving his claim will lead him to prove the claims of the remainder of his class. Mersay v. First Republic Corp., 43 F.R.D. 465 (S.D.N.Y.1968). Both plaintiffs clearly meet these requisites. Defendants do not challenge the adequacy of the representation of plaintiffs’ counsel.15
Defendants argue that plaintiffs cannot adequately represent the class because they have interests antagonistic to the other members of the class. Defendants raise one claim as to Hochschuler: the fact that he was in possession of the information at the time he purchased the stock would render his representation inadequate and he will consequently attempt to minimize facts known to him. The simple response to this contention is that there is no proof at this juncture that Hochschuler was aware of any aspect of the fraud. Consequently, since the authorities have uniformly held that the representation can represent prior purchasers, Hochschuler is an adequate representative.16 Defendants claim Gordon will not be motivated to prove nondisclosures subsequent to his purchase. As the court noted in the section on typicality, a prior purchaser has an interest in proving subsequent acts where a “common thread” or “essential continuity of omissions” exists. Since the adequacy of plaintiffs’ counsel is not at issue,17 both plaintiffs meet the requisites of rule 23(a)(4).
V Predominance and Superiority i Predominance
Finally, in order for this matter to proceed as a class action, the plaintiffs must show “that the questions of law or fact common to the members of the class predominate over any questions affecting only individual members; and that a class action is superior to other available methods for the fair and efficient adjudication of the controversy.” Rule 23(b)(3). In making this determination the threshold question that the court must consider is whether the group for which certification is sought [349]*349seeks to remedy a common legal grievance. 3B Moore’s Federal Practice § 23.45[a], at 23-322 (2d ed. 1978). “The common issues need not be dispositive of the entire litigation. The fact that questions peculiar to each individual member of the class may remain after the common questions have been resolved does not dictate the conclusions that a class action is not permissible.” Dolgow v. Anderson, 43 F.R.D. 472, 490 (E.D.N.Y.1968). Plaintiffs’ allegations plainly meet the test here.
Defendants first contend that the statements plaintiffs allege were misleading were in fact accurate factual descriptions of past achievements which created false “impressions” with respect to future developments. They contend individual issues of what each class member’s false impression was are consequently raised. Such an argument wholly misapprehends the nature of plaintiffs’ claim. The claim is based on defendants’ alleged concerted effort to conceal the carcinogenicity of the three drugs. Whether this scheme existed is a question touching the claim of the entire class. As plaintiffs correctly point out, whether the statements were made knowingly to conceal these facts will present a common issue. Where a common nucleus of fraud within several representations or omissions is alleged, the predominance question has been met. Blackie v. Barrack, 524 F.2d 891 (9th Cir. 1975); Green v. Wolf Corp., 406 F.2d 291 (2d Cir. 1968), cert. denied, 395 U.S. 977, 89 S.Ct. 2131, 23 L.Ed.2d 766 (1969); Lewis v. Capital Mortgage Investments, 78 F.R.D. 295 (D.Md. 1977); Simon v. Westinghouse Electric Corp., 73 F.R.D. 480 (E.D.Pa.1977); Dolgow v. Anderson, 43 F.R.D. 472 (E.D.N.Y.1968). Here common questions predominate as to whether defendants disseminated misleading statements or material omissions, whether they artificially inflated the market price and whether defendants violated the applicable sections with respect to the class.
Defendants next contend that issues of materiality and scienter raise individual issues which predominate over the common questions. They argue that since the facts relevant to a particular stock purchaser’s claim are only those facts existing at or near the time of that individual sale the question of materiality necessarily presents individual issues. The court does not view this argument as compelling. First, it ignores the allegations that defendants concealed material facts throughout the class period. Second, as plaintiffs note, materiality “is measured in terms of market impact, and does not vary among similarly situated investors.” See In re Equity Funding, No. M.D.L. 142, at 16 (C.D.Cal. March 26,1976) & cases cited therein. Further, “fluctuating market conditions during the proposed class period do not prevent certification of [the] class.” Lewis v. Capital Mortgage Investments, 78 F.R.D. 295, 306 (D.Md.1977). Defendants do not allege that there was significant variation during the class period. Cf. Sullivan v. Chase Investment Services, 79 F.R.D. 246 (N.D.Cal. 1978). Defendants place great reliance on Gelman v. Westinghouse Electric Corp., 73 F.R.D. 60 (W.D.Pa.1976). Gelman is distinguishable. Gelman involved a developing factual pattern whereas a concerted scheme of nondisclosure, conceived prior to the class period, is alleged here. The court specifically noted that no such scheme had been alleged and that plaintiff’s claims were “based not on a single or substantially constant misdeed, but rather on a changing fluctuating series of alleged events.” Id. at 67.
Finally, defendants’ argument that individual questions of reliance and damage defeat a finding of predominance is clearly without merit. Proof of individual reliance is not required in a nondisclosure case. Blackie v. Barrack, 524 F.2d at 905-08; Green v. Wolf Corporation, 406 F.2d at 301; Lewis v. Capital Mortgage Investments, 78 F.R.D. at 307-09; In re Memorex Securities Cases, 61 F.R.D. 88, 101 (N.D.Cal.1973). Further, individual damage questions do not prevent class certification. Blackie v. Barrack, 524 F.2d at 905; Lewis v. Capital Mortgage Investments, 78 F.R.D. at 306; Dolgow v. Anderson, 43 F.R.D. at 490.
[350]*350ii Superiority
In light of the above and considering the criteria articulated in rule 23(b)(3),18 it is clear that a class action is a superior mode of conducting this suit. The substantial number of possible claimants renders joindor, intervention and test case impracticable. The class members do not appear to have a special interest in controlling the suit and the court is unaware of any other pending actions.
Accordingly, for the reasons stated above, the court will provisionally certify a class of all persons who purchased G. D. Searle common stock from March 21, 1973 to July 10, 1975 and who did not sell their stock during the period. In so doing, the court notes that it is empowered at any time subsequent to the initial certification to amend or dissolve the class based upon facts which later develop. See, e.g., Elkind v. Liggitt & Myers, Inc., 77 F.R.D. 708, 710 (S.D.N.Y.1977).
It is so ordered.