[261]*261Justice Souter
delivered the opinion of the Court.
Respondent Securities Investor Protection Corporation (SIPC) alleges that petitioner Robert G. Holmes, Jr., conspired in a stock-manipulation scheme that disabled two broker-dealers from meeting obligations to customers, thus triggering SIPC’s statutory duty to advance funds to reimburse the customers. The issue is whether SIPC can recover from Holmes under the Racketeer Influenced and Corrupt Organizations Act (RICO), 18 U. S. C. §§ 1961-1968 (1988 ed. and Supp. II). We hold that it cannot.
) — i
<E
The Securities Investor Protection Act of 1970 (SIPA), 84 Stat. 1636, as amended, 15 U. S. C. §§ 78aaa-78III, authorized the formation of SIPC, a private nonprofit corporation, § 78ccc(a)(l), of which most broker-dealers registered under § 15(b) of the Securities Exchange Act of 1934, §78o(b), are required to be “members,” § 78ccc(a)(2)(A). Whenever SIPC determines that a member “has failed or is in danger of failing to meet its obligations to customers,” and finds certain other statutory conditions satisfied, it may ask for a “protective decree” in federal district court. § 78eee(a)(3). Once a court finds grounds for granting such a petition, § 78eee(b)(l), it must appoint a trustee charged with liquidating the member’s business, § 78eee(b)(3).
After returning all securities registered in specific customers’ names, §§ 78fiff — 2(c)(2); 78fff(a)(l)(A); 78111(3), the trustee must pool securities not so registered together with cash found in customers’ accounts and divide this pool ratably to satisfy customers’ claims, §§ 78fff-2(b); 78fff(a)(l)(B).1 To [262]*262the extent the pool of customer property is inadequate, SIPC must advance up to $500,000 per customer2 to the trustee for use in satisfying those claims. § 78fff-3(a).3
B
On July 24, 1981, SIPC sought a decree from the United States District Court for the Southern District of Florida to protect the customers of First State Securities Corporation (FSSC), a broker-dealer and SIPC member. Three days later, it petitioned the United States District Court for the Central District of California, seeking to protect the customers of Joseph Sebag, Inc. (Sebag), also a broker-dealer and SIPC member. Each court issued the requested decree and appointed a trustee, who proceeded to liquidate the broker-dealer.
Two years later, SIPC and the two trustees brought this suit in the United States District Court for the Central District of California, accusing some 75 defendants of conspiracy in a fraudulent scheme leading to the demise of FSSC and Sebag. Insofar as they are relevant here, the allegations were that, from 1964 through July 1981, the defendants manipulated stock of six companies by making unduly optimistic statements about their prospects and by continually selling small numbers of shares to create the appearance of a liquid market; that the broker-dealers bought substantial amounts of the stock with their own funds; that the market’s perception of the fraud in July 1981 sent the stocks plummeting; [263]*263and that this decline caused the broker-dealers’ financial difficulties resulting in their eventual liquidation and SIPC’s advance of nearly $13 million to cover their customers’ claims. The complaint described Holmes’ participation in the scheme by alleging that he made false statements about the prospects of one of the six companies, Aero Systems, Inc., of which he was an officer, director, and major shareholder; and that over an extended period he sold small amounts of stock in one of the other six companies, the Bunnington Corporation, to simulate a liquid market. The conspirators were said to have violated § 10(b) of the Securities Exchange Act of 1934, 15 U. S. C. §78j(b), Securities and Exchange Commission (SEC) Rule 10b-5, 17 CFR §240.10b-5 (1991), and the mail and wire fraud statutes, 18 U. S. C. §§ 1341,1343 (1988 ed., Supp. II). Finally, the complaint concluded that their acts amounted to a “pattern of racketeering activity” within the meaning of the RICO statute, 18 U. S. C. §§ 1962, 1961(1), and (5) (1988 ed. and Supp. II), so as to entitle the plaintiffs to recover treble damages, § 1964(c).
After some five years of litigation over other issues,4 the District Court entered summary judgment for Holmes on the RICO claims, ruling that SIPC “does not meet the ‘purchaser-seller’ requirements for standing to assert RICO claims which are predicated upon violation of Section 10(b) and Rule 10b-5,” App. to Pet. for Cert. 45a,5 and that neither [264]*264SIPC nor the trustees had satisfied the “proximate cause requirement under RICO,” id., at 39a; see id., at 37a. Although SIPC’s claims against many other defendants remained pending, the District Court under Federal Rule of Civil Procedure 54(b) entered a partial judgment for Holmes, immediately appealable. SIPC and the trustees appealed.
The United States Court of Appeals for the Ninth Circuit reversed and remanded after rejecting both of the District Court’s grounds. Securities Investor Protection Corporation v. Vigman, 908 F. 2d 1461 (1990). The Court of Appeals held first that, whereas a purchase or sale of a security is necessary for entitlement to sue on the implied right of action recognized under § 10(b) and Rule 10b-5, see Blue Chip Stamps v. Manor Drug Stores, 421 U. S. 723 (1975), the cause of action expressly provided by § 1964(c) of RICO imposes no such requirement limiting SIPC’s standing, 908 F. 2d, at 1465-1467. Second, the appeals court held the finding of no proximate cause to be error, the result of a mistaken focus on the causal relation between SIPC’s injury and the acts of Holmes alone; since Holmes could be held responsible for the acts of all his co-conspirators, the Court of Appeals explained, the District Court should have looked to the causal relation between SIPC’s injury and the acts of all conspirators. Id., at 1467-1469.6
Holmes’ ensuing petition to this Court for certiorari presented two issues, whether SIPC had a right to sue under [265]*265RICO,7 and whether Holmes could be held responsible for the actions of his co-conspirators. We granted the petition on the former issue alone, 499 U. S. 974 (1991), and now reverse.8
II
A
RICO’s provision for civil actions reads that
Free access — add to your briefcase to read the full text and ask questions with AI
[261]*261Justice Souter
delivered the opinion of the Court.
Respondent Securities Investor Protection Corporation (SIPC) alleges that petitioner Robert G. Holmes, Jr., conspired in a stock-manipulation scheme that disabled two broker-dealers from meeting obligations to customers, thus triggering SIPC’s statutory duty to advance funds to reimburse the customers. The issue is whether SIPC can recover from Holmes under the Racketeer Influenced and Corrupt Organizations Act (RICO), 18 U. S. C. §§ 1961-1968 (1988 ed. and Supp. II). We hold that it cannot.
) — i
<E
The Securities Investor Protection Act of 1970 (SIPA), 84 Stat. 1636, as amended, 15 U. S. C. §§ 78aaa-78III, authorized the formation of SIPC, a private nonprofit corporation, § 78ccc(a)(l), of which most broker-dealers registered under § 15(b) of the Securities Exchange Act of 1934, §78o(b), are required to be “members,” § 78ccc(a)(2)(A). Whenever SIPC determines that a member “has failed or is in danger of failing to meet its obligations to customers,” and finds certain other statutory conditions satisfied, it may ask for a “protective decree” in federal district court. § 78eee(a)(3). Once a court finds grounds for granting such a petition, § 78eee(b)(l), it must appoint a trustee charged with liquidating the member’s business, § 78eee(b)(3).
After returning all securities registered in specific customers’ names, §§ 78fiff — 2(c)(2); 78fff(a)(l)(A); 78111(3), the trustee must pool securities not so registered together with cash found in customers’ accounts and divide this pool ratably to satisfy customers’ claims, §§ 78fff-2(b); 78fff(a)(l)(B).1 To [262]*262the extent the pool of customer property is inadequate, SIPC must advance up to $500,000 per customer2 to the trustee for use in satisfying those claims. § 78fff-3(a).3
B
On July 24, 1981, SIPC sought a decree from the United States District Court for the Southern District of Florida to protect the customers of First State Securities Corporation (FSSC), a broker-dealer and SIPC member. Three days later, it petitioned the United States District Court for the Central District of California, seeking to protect the customers of Joseph Sebag, Inc. (Sebag), also a broker-dealer and SIPC member. Each court issued the requested decree and appointed a trustee, who proceeded to liquidate the broker-dealer.
Two years later, SIPC and the two trustees brought this suit in the United States District Court for the Central District of California, accusing some 75 defendants of conspiracy in a fraudulent scheme leading to the demise of FSSC and Sebag. Insofar as they are relevant here, the allegations were that, from 1964 through July 1981, the defendants manipulated stock of six companies by making unduly optimistic statements about their prospects and by continually selling small numbers of shares to create the appearance of a liquid market; that the broker-dealers bought substantial amounts of the stock with their own funds; that the market’s perception of the fraud in July 1981 sent the stocks plummeting; [263]*263and that this decline caused the broker-dealers’ financial difficulties resulting in their eventual liquidation and SIPC’s advance of nearly $13 million to cover their customers’ claims. The complaint described Holmes’ participation in the scheme by alleging that he made false statements about the prospects of one of the six companies, Aero Systems, Inc., of which he was an officer, director, and major shareholder; and that over an extended period he sold small amounts of stock in one of the other six companies, the Bunnington Corporation, to simulate a liquid market. The conspirators were said to have violated § 10(b) of the Securities Exchange Act of 1934, 15 U. S. C. §78j(b), Securities and Exchange Commission (SEC) Rule 10b-5, 17 CFR §240.10b-5 (1991), and the mail and wire fraud statutes, 18 U. S. C. §§ 1341,1343 (1988 ed., Supp. II). Finally, the complaint concluded that their acts amounted to a “pattern of racketeering activity” within the meaning of the RICO statute, 18 U. S. C. §§ 1962, 1961(1), and (5) (1988 ed. and Supp. II), so as to entitle the plaintiffs to recover treble damages, § 1964(c).
After some five years of litigation over other issues,4 the District Court entered summary judgment for Holmes on the RICO claims, ruling that SIPC “does not meet the ‘purchaser-seller’ requirements for standing to assert RICO claims which are predicated upon violation of Section 10(b) and Rule 10b-5,” App. to Pet. for Cert. 45a,5 and that neither [264]*264SIPC nor the trustees had satisfied the “proximate cause requirement under RICO,” id., at 39a; see id., at 37a. Although SIPC’s claims against many other defendants remained pending, the District Court under Federal Rule of Civil Procedure 54(b) entered a partial judgment for Holmes, immediately appealable. SIPC and the trustees appealed.
The United States Court of Appeals for the Ninth Circuit reversed and remanded after rejecting both of the District Court’s grounds. Securities Investor Protection Corporation v. Vigman, 908 F. 2d 1461 (1990). The Court of Appeals held first that, whereas a purchase or sale of a security is necessary for entitlement to sue on the implied right of action recognized under § 10(b) and Rule 10b-5, see Blue Chip Stamps v. Manor Drug Stores, 421 U. S. 723 (1975), the cause of action expressly provided by § 1964(c) of RICO imposes no such requirement limiting SIPC’s standing, 908 F. 2d, at 1465-1467. Second, the appeals court held the finding of no proximate cause to be error, the result of a mistaken focus on the causal relation between SIPC’s injury and the acts of Holmes alone; since Holmes could be held responsible for the acts of all his co-conspirators, the Court of Appeals explained, the District Court should have looked to the causal relation between SIPC’s injury and the acts of all conspirators. Id., at 1467-1469.6
Holmes’ ensuing petition to this Court for certiorari presented two issues, whether SIPC had a right to sue under [265]*265RICO,7 and whether Holmes could be held responsible for the actions of his co-conspirators. We granted the petition on the former issue alone, 499 U. S. 974 (1991), and now reverse.8
II
A
RICO’s provision for civil actions reads that
“[a]ny person injured in his business or property by reason of a violation of section 1962 of this chapter may sue therefor in any appropriate United States district court and shall recover threefold the damages he sustains and the cost of the suit, including a reasonable attorney’s fee.” 18 U. S. C. § 1964(c).
This language can, of course, be read to mean that a plaintiff is injured “by reason of” a RICO violation, and therefore may recover, simply on showing that the defendant violated § 1962,9 the plaintiff was injured, and the defendant’s viola[266]*266tion was a “but for” cause of plaintiff’s injury. Cf. Associated General Contractors of Cal., Inc. v. Carpenters, 459 U. S. 519, 529 (1983). This construction is hardly compelled, however, and the very unlikelihood that Congress meant to allow all factually injured plaintiffs to recover10 persuades us that RICO should not get such an expansive reading.11 Not even SIPC seriously argues otherwise.12
[267]*267The key to the better interpretation lies in some statutory history. We have repeatedly observed, see Agency Holding Corp. v. Malley-Duff & Associates, Inc., 483 U. S. 143, 150-151 (1987); Shearson/American Express Inc. v. McMahon, 482 U. S. 220, 241 (1987); Sedima, S. P. R. L. v. Imrex Co., 473 U. S. 479, 489 (1985), that Congress modeled § 1964(c) on the civil-action provision of the federal antitrust laws, § 4 of the Clayton Act, which reads in relevant part that
“any person who shall be injured in his business or property by reason of anything forbidden in the antitrust laws may sue therefor . . . and shall recover threefold the damages by him sustained, and the cost of suit, including a reasonable attorney’s fee.” 15 U. S. C. § 15.
In Associated General Contractors, supra, we discussed how Congress enacted §4 in 1914 with language borrowed from § 7 of the Sherman Act, passed 24 years earlier.13 Before 1914, lower federal courts had read §7 to incorporate common-law principles of proximate causation, 459 U. S., at 533-534, and n. 29 (citing Loeb v. Eastman Kodak Co., 183 F. 704 (CA3 1910); Ames v. American Telephone & Telegraph Co., 166 F. 820 (CC Mass. 1909)), and we reasoned, as many lower federal courts had done before us, see Associated Gen[268]*268eral Contractors, supra, at 536, n. 33 (citing cases),14 that congressional use of the § 7 language in § 4 presumably carried the intention to adopt “the judicial gloss that avoided a simple literal interpretation,” 459 U. S., at 534. Thus, we held that a plaintiff’s right to sue under § 4 required a showing that the defendant’s violation not only was a “but for” cause of his injury, but was the proximate cause as well.
The reasoning applies just as readily to § 1964(c). We may fairly credit the 91st Congress, which enacted RICO, with knowing the interpretation federal courts had given the words earlier Congresses had used first in § 7 of the Sherman Act, and later in the Clayton Act’s § 4. See Cannon v. University of Chicago, 441 U. S. 677, 696-698 (1979). It used the same words, and we can only assume it intended them to have the same meaning that courts had already given them; See, e. g., Oscar Mayer & Co. v. Evans, 441 U. S. 750, 756 (1979); Northcross v. Memphis Bd. of Ed., 412 U. S. 427, 428 (1973). Proximate cause is thus required.
Here we use “proximate cause” to label generically the judicial tools used to limit a person’s responsibility for the consequences of that person’s own acts. At bottom, the notion of proximate cause reflects “ideas of what justice demands, or of what is administratively possible and convenient.” W. Keeton, D. Dobbs, R. Keeton, & D. Owen, Prosser and Keeton on Law of Torts §41, p. 264 (5th ed. 1984). Accordingly, among the many shapes this concept took at common law, see Associated General Contractors, supra, at 532-533, was a demand for some direct relation between the injury asserted and the injurious conduct alleged. Thus, a plaintiff who complained of harm flowing merely from the misfortunes visited upon a third person by the defendant’s acts was generally said to stand at too remote a distance to [269]*269recover. See, e. g., 1 J. Sutherland, Law of Damages 55-56 (1882).
Although such directness of relationship is not the sole requirement of Clayton Act causation,15 it has been one of its central elements, Associated General Contractors, 459 U. S., at 540, for a variety of reasons. First, the less direct an injury is, the more difficult it becomes to ascertain the amount of a plaintiff’s damages attributable to the violation, as distinct from other, independent, factors. Id., at 542-543. Second, quite apart from problems of proving factual causation, recognizing claims of the indirectly injured would force courts to adopt complicated rules apportioning damages among plaintiffs removed at different levels of injury from the violative acts, to obviate the risk of multiple recoveries. Id., at 543-544; Blue Shield of Virginia v. McCready, 457 U. S. 465, 473-475 (1982); Hawaii v. Standard Oil Co. of Cal., 405 U. S. 251, 264 (1972). And, finally, the need to grapple with these problems is simply unjustified by the general interest in deterring injurious conduct, since directly injured victims can generally be counted on to vindicate the law as [270]*270private attorneys general, without any of the problems attendant upon suits by plaintiffs injured more remotely. Associated General Contractors, supra, at 541-542.
We will point out in Part III-A below that the facts of the instant case show how these reasons apply with equal force to suits under § 1964(c).
h — < H-i
As we understand SIPC s argument, it claims entitlement to recover, first, because it is subrogated to the rights of those customers of the broker-dealers who did not purchase manipulated securities, and, second, because a SIPA provision gives it an independent right to sue. The first claim fails because the conspirators’ conduct did not proximately cause the nonpurchasing customers’ injury, the second because the provision relied on gives SIPC no right to sue for damages.
As a threshold matter, SIPC’s theory of subrogation is fraught with unanswered questions. In suing Holmes, SIPC does not rest its claimed subrogation to the rights of the broker-dealers’ customers on any provision of SIPA. See Brief for Respondent 38, and n. 181. SIPC assumes that SIPA provides for subrogation to the customers’ claims against the failed broker-dealers, see 15 U. S. C. §§78fff-3(a), 78fff-4(c); see also § 78fff-2(c)(l)(C); see generally Mishkin v. Peat, Marwick, Mitchell & Co., 744 F. Supp. 531, 556-557 (SDNY 1990), but not against third parties like Holmes. As against him, SIPC relies rather on “common law rights of subrogation” for what it describes as “its money paid to customers for customer claims against third parties.” Brief for Respondent 38 (footnote omitted). At oral argument in this Court, SIPC narrowed its subrogation argument to cover only the rights of customers who never purchased manipu[271]*271lated securities. Tr. of Oral Arg. 29.16 But SIPC stops there, leaving us to guess at the nature of the “common law rights of subrogation” that it claims, and failing to tell us whether they derive from federal or state common law, or, if the latter, from common law of which State.17 Nor does SIPC explain why it declines to assert the rights of customers who bought manipulated securities.18
It is not these questions, however, that stymie SIPC’s sub-rogation claim, for even assuming, arguendo, that it may stand in the shoes of nonpurchasing customers, the link is too remote between the stock manipulation alleged and the customers’ harm, being purely contingent on the harm suffered by the broker-dealers. That is, the conspirators have allegedly injured these customers only insofar as the stock manipulation first injured the broker-dealers and left them without the wherewithal to pay customers’ claims. Although the customers’ claims are senior (in recourse to “customer property”) to those of the broker-dealers’ general creditors, see § 78fff-2(c)(l), the causes of their respective injuries are the same: The broker-dealers simply cannot pay their bills, and only that intervening insolvency connects the conspirators’ acts to the losses suffered by the nonpurchasing customers and general creditors.
As we said, however, in Associated General Contractors, quoting Justice Holmes, “‘The general tendency.of the law, in regard to damages at least, is not to go beyond the first step.’ ” 459 U. S., at 534 (quoting Southern Pacific Co. v. [272]*272Darnell-Taenzer Lumber Co., 245 U. S. 531, 533 (1918)),19 and the reasons that supported conforming Clayton Act causation to the general tendency apply just as readily to the present facts, underscoring the obvious congressional adoption of the Clayton Act direct-injury limitation among the requirements of § 1964(c).20 If the nonpurchasing customers were [273]*273allowed to sue, the district court would first need to determine the extent to which their inability to collect from the broker-dealers was the result of the alleged conspiracy to manipulate, as opposed to, say, the broker-dealers' poor business practices or their failures to anticipate developments in the financial markets. Assuming that an appropriate assessment of factual causation could be made out, the district court would then have to find some way to apportion the possible respective recoveries by the broker-dealers and the customers, who would otherwise each be entitled to recover the full treble damages. Finally, the law would be shouldering these difficulties despite the fact that those directly injured, the broker-dealers, could be counted on to bring suit for the’ law’s vindication. As noted above, the broker-dealers have in fact sued in this case, in the persons of their SIPA trustees appointed on account of their insolvency.21 [274]*274Indeed, the insolvency of the victim directly injured adds a further concern to those already expressed, since a suit by an indirectly injured victim could be an attempt to circumvent the relative priority its claim would have in the directly injured victim’s liquidation proceedings. See Mid-State Fertilizer Co. v. Exchange National Bank of Chicago, 877 F. 2d 1333, 1336 (CA7 1989).
As against the force of these considerations of history and policy, SIPC’s reliance on the congressional admonition that RICO be “liberally construed to effectuate its remedial purposes,” § 904(a), 84 Stat. 947, does not deflect our analysis. There is, for that matter, nothing illiberal in our construction: We hold not that RICO cannot serve to right the conspirators’ wrongs, but merely that the nonpurchasing customers, or SIPC in their stead, are not proper plaintiffs. Indeed, we fear that RICO’s remedial purposes would more probably be hobbled than helped by SIPC’s version of liberal construction: Allowing suits by those injured only indirectly would open the door to “massive and complex damages litigation[, which would] not only burde[n] the courts, but [would] also undermin[e] the effectiveness of treble-damages suits.” Associated General Contractors, 469 U. S., at 545.
In sum, subrogation to the rights of the manipulation conspiracy’s secondary victims does, and should, run afoul of proximate-causation standards, and SIPC must wait on the outcome of the trustees’ suit. If they recover from Holmes, SIPC may share according to the priority SIPA gives its claim. See 15 U. S. C. § 78fff-2(c).
SIPC also claims a statutory entitlement to pursue Holmes for funds advanced to the trustees for administering the liquidation proceedings. See Tr. of Oral Arg. 30. Its theory here apparently is not one of subrogation, to which the statute makes no reference in connection with SIPC’s obligation [275]*275to make such advances. See 15 U. S. C. § 78fff-3(b)(2).22 SIPC relies instead, see Brief for Respondent 37, and n. 180, on this SIPA provision:
“SIPC participation — SIPC shall be deemed to be a party in interest as to all matters arising in a liquidation proceeding, with the right to be heard on all such matters, and shall be deemed to have intervened with respect to all such matters with the same force and effect as if a petition for such purpose had been allowed by the court.” 15U.S.C. §78eee(d).
The language is inapposite to the issue here, however. On its face, it simply qualifies SIPC as a proper party in interest in any “matter arising in a liquidation proceeding” as to which it “shall be deemed to have intervened.” By extending a right to be heard in a “matter” pending between other parties, however, the statute says nothing about the conditions necessary for SIPC’s recovery as a plaintiff. How the provision could be read, either alone or with § 1964(c), to give SIPC a right to sue Holmes for money damages simply eludes us.
IV
Petitioner urges us to go further and decide whether every RICO plaintiff who sues under § 1964(c) and claims securities fraud as a predicate offense must have purchased or sold a security, an issue on which the Circuits appear divided.23 We decline to do so. Given what we have said in Parts II [276]*276and III, our discussion of the issue would be unnecessary to the resolution of this case. Nor do we think that leaving this question unanswered will deprive the lower courts of much-needed guidance. A review of the conflicting cases shows that all could have been resolved on proximate-causation grounds, and that none involved litigants like those in Blue Chip Stamps v. Manor Drug Stores, 421 U. S. 723 (1975), persons who had decided to forgo securities transactions in reliance on misrepresentations. Thus, we think it inopportune to resolve the issue today.
V
We hold that, because the alleged conspiracy to manipulate did not proximately cause the injury claimed, SIPC’s allegations and the record before us fail to make out a right to sue petitioner under § 1964(c). We reverse the judgment of the Court of Appeals and remand the case for further proceedings consistent with this opinion.
It is so ordered.