ORDER
ROBERT C. JONES, District Judge.
This case arises out of the alleged trading of unregistered securities. The Court has granted a Motion for Preliminary Injunction (ECF No. 6). For the reasons given herein, the Court vacates the previous order, replaces it with the present Order, and denies Defendant’s Motion to Reconsider (ECF No. 29).
I. FACTS AND PROCEDURAL HISTORY
Defendant Banc de Binary, Ltd. is a Cypriot company with a license to operate in Cyprus under supervision of the Cyprus Securities and Exchange Commission, as well as licenses to operate in Germany, Spain, and the United Kingdom, but it has no license from Plaintiff Securities and Exchange Commission (“SEC”) to operate in the United States. (See Compl. ¶¶ 7-8, June 5, 2013, ECF No. 1). Defendant operates an “online trading platform,” selling “binary options.” (Id. 9). A customer can go to Defendant’s website and purchase a binary option, for example in stock of XYZ, Inc. (Id.). The customer selects the amount of the binary option (between $1 and $3000) and bets whether the stock of XYZ, Inc. will rise or fall from the current price as of a given time and date in the future. (Id. ¶ 14). Defendant’s website then determines the percentage payout the customer will receive if correct. (Id. ¶ 15). If the customer is correct, he receives back the initial amount he paid for the binary option plus his winnings (the initial bet multiplied by the percentage payout); if the customer is incorrect, he loses much or all of the price he paid for the binary option. (Id. ¶¶ 9, 16). The wagers are called “binary” options because there are only two possible outcomes.
Defendant has never registered with the SEC. (Id. ¶ 8). Defendant solicits customers within the United States. (See id. ¶¶ 19-23). Although Defendant claims to have stopped soliciting U.S. customers, existing U.S. customers can still use their accounts to purchase binary options. (Id. ¶24). .The SEC has sued Defendant in this Court for violations of § 5 of the Securities Act of 1933 and § 15(a) of the Securities Exchange Act of 1934 and has asked the Court to issue a preliminary injunction.
II. LEGAL STANDARDS
The Court of Appeals has used two separate sets of criteria for determining [1232]*1232whether to grant preliminary injunctive relief:
Under the traditional test, a plaintiff must show: (1) a strong likelihood of success on the merits, (2) the possibility of irreparable injury to plaintiff if preliminary relief is not granted, (3) a balance of hardships favoring the plaintiff, and (4) advancement of the public interest (in certain cases). The alternative test requires that a plaintiff demonstrate either a combination of probable success on the merits and the possibility of irreparable injury or that serious questions are raised and the balance of hardships tips sharply in his favor.
Taylor v. Westly, 488 F.3d 1197, 1200 (9th Cir.2007). “These two formulations represent two points on a sliding scale in which the required degree of irreparable harm increases as the probability of success decreases.” Id.
The Supreme Court has ruled, however, that a plaintiff seeking an injunction must demonstrate that irreparable harm is “likely,” not just possible. Winter v. NRDC; 555 U.S. 7, 19-23, 129 S.Ct. 365, 172 L.Ed.2d 249 (2008) (rejecting the Ninth Circuit’s alternative “sliding scale” test, at least as to the irreparable harm element). The Court of Appeals has explicitly recognized that its “possibility” test was “definitively refuted” in Winter, and that “[t]he proper legal standard for preliminary injunctive relief requires' a party to demonstrate ‘that he is likely to succeed on the merits, that he is likely to suffer irreparable harm in the absence of preliminary relief, that the balance of equities tips in his favor, and that an injunction is in the public interest.’ ” Stormans, Inc. v. Selecky, 586 F.3d 1109, 1127 (9th Cir.2009) (quoting Winter, 129 S.Ct. at 374) (reversing a district court’s’ use of the Ninth Circuit’s pre-Winter “sliding-scale” standard and remanding for application of the proper standard).
A later panel ruled that the sliding scale test remains viable when there is a lesser showing of likelihood of success on the merits amounting to “serious questions,” just not when there is a lesser showing of likelihood of irreparable harm. See Alliance for the Wild Rockies v. Cottrell, 632 F,3d 1127, 1134 (9th Cir.2011). Cottrell presents some difficulty in light of Winter and Selecky. As an initial matter, to the extent Cottrell’s interpretation of Winter is inconsistent with Selecky’s interpretation of the same case, Selecky controls. See Miller v. Gammie, 335 F.3d 889, 899 (9th Cir.2003) (en banc) (holding that, in the absence of an intervening Supreme Court decision, only the en banc court may overrule a decision by a three judge panel). In any case, the Supreme Court stated in Winter that “[a] plaintiff seeking a preliminary injunction must establish that he is likely to succeed on the merits, that he is likely to suffer irreparable harm in the absence of preliminary relief, that the balance of equities tips in his favor, and that an injunction is in the public interest.” Winter, 555 U.S. at 20, 129 S.Ct. 365 (citing Munaf v. Geren, 553 U.S. 674, 689-90, 128 S.Ct. 2207, 171 L.Ed.2d 1 (2008); Amoco Prod. Co. v. Gambell, 480 U.S. 531, 542, 107 S.Ct. 1396, 94 L.Ed.2d 542 (1987); Weinberger v. Romero-Barcelo, 456 U.S. 305, 311-12, 102 S.Ct. 1798, 72 L.Ed.2d 91 (1982)) (emphases added). The test is presented as a four-part conjunctive test, not as a four-factor balancing test, and the word “likely” modifies the suecess-on-themerits prong in exactly the same way it separately modifies the irreparable-harm prong, indicating that in an appropriate case, the Court would require a movant to show that he is more likely than not to succeed on the merits. In rejecting the sliding-scale test, the Winter Court emphasized the fact that the word “likely ” [1233]*1233modifies the irreparable-injury prong. See id. at 22, 129 S.Ct. 365 (emphasis in original). The word “likely” also modifies the suecess-on-the-merits prong. See id. at 20,129 S.Ct. 365.
In summary, to satisfy Winter, a movant must show that he is “likely” to succeed on the merits. “Likely” means “having a high probability of occurring or being true.” Merriam-Webster Dictionary, http://www.merriam-webster.com/ dictionary/likely. This colloquial, lay definition of “likely” may be too stringent. Though it could be read consistently with Winter, Merriam-Webster’s definition of “likely” would appear to require a showing corresponding to the clear-and-convincing-evidence standard, because something with a “high probability” of being true has more than a mere greater-than-not chance of being true. Black’s Law Dictionary, a more contextual reference work, defines the “likelihood-of-success-on-the-merits test” more leniently as “[t]he rule that a litigant who seeks [preliminary relief] must show a reasonable probability of success .... ” Black’s Law Dictionary 1012 (9th ed. 2009). The. Court must reconcile the cases by interpreting the Cottrell “serious questions” requirement to be in harmony with the Winter/Selecky “likelihood” standard, not as being in competition with it. “Serious questions going to the merits” must mean that there is at least a reasonable probability of success on the merits. On its face, the phrase “serious questions” appears to focus on the gravity of the issues, but appears silent on the probability of the truth of the proffered proposition, which is the focus of the success-on-the-merits prong. The gravity of the issues is separately considered under the balance-of-hardships prong. The Cottrell court must have meant something like “reasonable probability,” which appears to be the most lenient position on the sliding scale that can satisfy the requirement that success on the merits be “likely.” If success on the merits is merely possible, but not at least reasonably probable, no set of circumstances with respect to the other prongs will justify preliminary relief.
III. ANALYSIS
The Court grants the Motion for Preliminary Injunction. The Court will, however, discuss whether and why binary options, as described in the Complaint, are “securities” the SEC may regulate, because they are not the kind of transaction that one typically thinks of when one thinks of securities.1 “Security” is defined under the Securities Exchange Act of 1934 (the “Act”), as amended, as:
any note, stock, treasury stock, security future, security-based swap, bond, debenture, certificate of interest or participation in any profit-sharing agreement or in any oil, gas, or other mineral royalty or lease, any collateral-trust certificate, preorganization certificate or subscription, transferable share, investment contract, voting-trust certificate, certificate of deposit for a security, any put, call, straddle, option, or privilege on any security, certificate of deposit, or group or index of securities (including any interest therein or based on the value thereof), or any put, call, straddle, option, or privilege entered into on a national securities exchange relating to foreign currency, or in general, any instrument commonly known as a “security”; or any certificate • of interest or [1234]*1234participation in, temporary or interim certificate for, receipt for, or warrant or right to subscribe to or purchase, any of the foregoing; but shall not include currency or any note, draft, bill of exchange, or banker’s acceptance which has a maturity at the time of issuance of not exceeding nine months, exclusive of days of grace, or any renewal thereof the maturity of which is likewise limited.
15 U.S.C. § 78c(a)(10).
Traditional stock options are securities because they are in fact “option[s] ... on [a] security,” i.e., they are option contracts to purchase or sell stock itself at a predetermined value. See Blue Chip Stamps v. Manor Drug Stores, 421 U.S. 723, 750-51, 95 S.Ct. 1917, 44 L.Ed.2d 539 (1975).2 With a binary option, however, the purchaser receives neither the stock itself nor the right to purchase the stock in the future. Binary options are in substance pure gambling bets. They are also unlike options in that they do not require exercise by the owner. They are simply wagers that will pay (or not) automatically upon a certain date. The condition upon which the bets turn are the price of stock — more accurately, whether a stock has increased or decreased in value as of the time and date of the wager, not by what amount it has increased or decreased in value — and the binary option purchaser receives no putative interest in the stock whatsoever, i.e., no option to purchase or sell it at a given price. Regardless of their name, then, binary options are in substance not option contracts at all, but wagering contracts. Compare Black’s Law Dictionary 375 (9th ed. 2009) (“wagering contract. 1. A contract the performance of which depends on the happening of an uncertain event, made entirely for sport.”); with id. 1203 (“option ... 4. The right (but not the obligation) to buy or sell a given quantity of securities, commodities, or other assets at a fixed price within a specified time____”). The concept of binary options is relatively new — Black’s Law Dictionary has no entry for them. Black’s does, however, have an entry for the closest thing to binary options heretofore encountered apart from the entry for “wagering contract.” See id. 1204 (naked option. A call [1235]*1235option that grants another the right to buy stock even though the option-giver does not own the stock to back up that commitment.”). A naked option is different from a binary option in a critical regard, however, because a naked option is still an option to purchase stock. The fact that the naked option giver does not in fact own the stock to back up the option if exercised is relevant to breach of the option contract and perhaps even fraud, but the transaction is still a transaction of securities, because the naked option giver has in fact promised to deliver the securities if the option is executed. The naked option purchaser may have no practical ability to obtain stock through the exercise of the option because the option giver has defrauded him (or at least seriously risked an inability to perform under the option contract), but' the binary option giver has made no promise of the binary option phrehaser’s ability to obtain the stock. He has made no pretense of being anything other than a bookmaker. Both parties to a binary option are well aware that the transaction includes no present* future, vested, or contingent interest in the stock itself. Binary option givers and buyers do not purport to trade interests in securities any more than tellers and gamblers at a racetrack purport to trade interests in horses. In these transactions, the securities and the horses, respectively, are neither part of the consideration for nor the subject matter of the contract, but rather the securities’ and horses’ respective performance is simply a remote condition precedent triggering the obligations of the parties. Although stock investments, and particularly stock options, may also be fairly described as “gambling” in a colloquial sense, binary options constitute gambling in a more profound and essential way, because the purchaser of a binary option receives no present or future interest whatsoever in any security.
Next, binary options resemble European-style options in one way. That is, European-style options, unlike American-style options, may only be executed at the time of expiration. But unlike binary options, European-style options still include the right to obtain the security via execution at that time.
Finally, the binary options at issue here may be “cash-settled options” that the SEC may regulate. See Caiola v. Citibank, N.A., N.Y., 295 F.3d 312, 326-27 (2d Cir.2002). The Caiola court ruled that the fact that options are cash-settled rather than settled by delivery is not important to whether they qualify as “securities” under the statute. See id.3 The Court agrees in part but respectfully disagrees that cash-settled options are “options” under the meaning of § 78c(a)(10) even in cases where the “option” gives the purchaser no pretense whatsoever to the right to obtain the underlying security. The Court agrees that the Act does not distinguish between regulated and “over-the-counter” (private, unregulated) options. See id. at [1236]*1236325. There is, as the Second Circuit noted, no language expressing or implying such a. distinction in the statute. The Court also agrees that the Act does not distinguish between physically-settled and cash-settled options per se. See id. The Act does not speak in terms of how the parties settle their options contracts. But the statute, as broad as it is, only lists certain items, and the Court believes there is a critical distinction between: (1) cash-settled options under which the purchaser has a legal right to obtain the security but where the parties in practice agree to settle the option with cash, whether or not that intention or expectation existed when the option was given (“potentially cash-settled options”); and (2) cash-settled options under which there is no putative right to obtain the security (“necessarily cash-settled options”). The Court simply cannot agree that a contract under which the purchaser has no putative right to obtain the security is an “option.” There is no good reason to read more than the common definition of “option” into the statute. An “option” is the right, but not the duty, to do something, i.e., the possibility of exercising the right to a particular course of action. Binary options simply do not contain this characteristic. They do not even give the purchaser the right to determine whether or when to' execute the supposed “option.” They give the purchaser no putative right to choose any future course of action whatsoever. Binary options, like necessarily cash-settled options, are wagering contracts regardless of their title.
The Court also respectfully disagrees with the Second Circuit’s reasoning that the statute would not include in the definition of “security” options on groups and indexes of securities if the intent were not to regulate transactions under which it is known no physical representation of the right to the security will be delivered, because one cannot deliver a share of an index or group of securities. See id. at 325-26. The Caiola court’s reasoning here is persuasive until one closely examines a critical premise upon which it is based. There have been such things as mutual funds and index funds for quite some time, for at least as long as more exotic types of investments like necessarily cash-settled options. Mutual funds are securities consisting of bundles of stocks and/or other securities, and index funds are a subclass of mutual funds consisting of bundles of stocks representing an entire stock index such that the value of shares of the index fund are inherently tied to the value of the index itself. The Court is aware of no reason why instruments representing shares of ownership in such funds cannot be physically delivered, whether regulated or not. The Court agrees that in cases where the option agreement includes the right to obtain an interest in a mutual fund or index fund, i.e., potentially cash-settled options, .the option is in fact an “option,” and therefore a “security” under the statute. .But if the agreement is a pure wager, with no putative right to obtain the security thereunder, as with necessarily cash-settled options and binary options, the agreement simply does not fall under the commonly understood definition of an “option,” which, critically, the Act does not separately define, and the transaction is simply a wagering contract.
The Complaint itself indicates that Defendant’s website contains classic indicia of a gambling operation. For example, Defendant’s website determines the amount of the payout based not upon the actual increase or decrease in the value of the underlying security but rather upon a predetermined payout percentage depending only upon whether the price has gone up or down as of a future date and time with respect to the date and time of pur[1237]*1237chase. (See Compl. ¶ 16). That is, like at a racetrack or sports book, the house determines how much the wagerer wins or loses by adjusting the odds based upon the house’s estimation of the outcome of the bet and/or the sums of other customers’ pending bets, so as to ensure a profit for the house. In this case it is probably a computer algorithm, as opposed to a human odds maker, that makes the calculations, but the principle is the same. Also, Defendant offers “trading bonuses” to customers depositing money with Defendant in the same way that casinos entice customers to gamble by offering gambling credits, knowing that the customer will spend the free credits and then his own funds, as well. (See id. ¶ 22). That is the “economic reality” of these transactions. See SEC v. W.J. Howey Co., 328 U.S. 293, 298, 66 S.Ct. 1100, 90 L.Ed. 1244 (1946).
Defendants are not off the hook, however. Although they are not “options,” binary options are “securities” under the statute. The Act includes in the definition of “security” “any put, call, straddle, option, or privilege on any security, certificate of deposit, or group or index of securities (including any interest therein or based on the value thereof).... ” 15 U.S.C. § 78c(a)(10) (emphasis added). It is this parenthetical text that makes clear Congress’ intent to give the SEC the power to regulate both the trading of interests in securities directly and wagering contracts turning on the value of securities, regardless of whether the latter are dressed up as options contracts or given dissembling titles such as “cash-settled options.” Although binary options are not “options” under the Act, they are “privileges ... based on the value [of securities]” because they give the purchaser a contractual right to the payment of money based upon the value of securities. They are probably also “puts” or “calls” because they are bets that the price of the security will rise or fall. The Court agrees with the Caiola court that the parenthetical phrase “including any interest therein or based on the value thereof’ modifies the entire preceding phrase “any security, certificate of deposit, or group or index of securities,” not only the final member of that list. See Caiola, -295 F.3d at 326. In summary, Congress has empowered the SEC under the Act to regulate wagering contracts turning upon the value of securities. That is what binary options are, and the SEC may therefore regulate them. The standards for a preliminary injunction being satisfied, the Court grants the Motion for Preliminary Injunction.4
The Court rejects Defendant’s argument that the present Motion is moot because Defendant has both ceased soliciting and accepting new American customers and has, contrary to Plaintiffs allegations, frozen the accounts of existing American customers. Defendant’s voluntary cessation of the alleged unlawful activity does not negate a justiciable controversy under the mootness doctrine, because Defendant could begin soliciting and accepting new American customers or permitting existing American custom[1238]*1238ers to use their accounts again at any time. See Friends of the Earth, Inc. v. Laidlaw Envtl. Servs. (TOC), Inc., 528 U.S. 167, 189, 120 S.Ct. 693, 145 L.Ed.2d 610 (2000). And Defendant is wrong that Plaintiff bears the burden of proving this exception under the likelihood-of-success-on-the-merits prong of the preliminary injunction standard. The mootness issue is a prudential jurisdictional question antecedent to the merits of the preliminary injunction motion, not a merits question incorporated therein, and “[t]he heavy burden of persuading the court that the challenged conduct ■ cannot reasonably be expected to start up again lies with the party asserting mootness.” Id. (internal quotation marks and alteration omitted). Defendant has not satisfied that burden.
CONCLUSION
IT IS HEREBY ORDERED that the Motion for Preliminary Injunction (ECF No. 6) is GRANTED.
IT IS FURTHER ORDERED that the Order (ECF No. 28) is VACATED.
IT IS FURTHER ORDERED that the Motion to Reconsider (ECF No. 29) is DENIED.
IT IS FURTHER ORDERED that Banc de Binary, and its officers, agents, servants, employees, attorneys, subsidiaries and affiliates, and those persons in active concert or participation with any of them who receive actual notice of this Order, by personal service or otherwise; and each of them, be and hereby are temporarily restrained and enjoined from, directly or indirectly, in the absence of any applicable exemption, (a) offering and selling in the United States binary options that are based on .stock or stock indices and that are offered on Banc de Binary’s website (www.bbinary.com), unless a registration statement is in effect as to such binary options, or (b) otherwise:
. (i) making use of any means or instruments of transportation or communication in interstate commerce or of the mails in the United States to sell a security through the use or medium of any prospectus or otherwise, unless a registration statement is in effect as to such security;
(ii) carrying or causing to be carried through the mails or in interstate commerce in the United States, by any means or instruments of transportation, any security for the purpose of sale or for delivery after sale, unless a registration statement is in effect as to such security; or
(iii) making use of any means or instruments of transportation or communication in interstate commerce or of the mails to offer to sell or offer to buy in the United States through the use or medium of any prospectus or otherwise any security, unless a registration statement has been filed with the SEC as to such security, or while the registration statement is the subject of a refusal order or stop order or (prior to the effective date of the registration statement) any public proceeding or examination under Section 8 of the Securities Act, 15 U.S.C. § 77h; in violation of Section 5 of the Securities Act, 15 U.S.C. § 77e.
IT IS FURTHER ORDERED that Banc de Binary, and its officers, agents, servants, employees, attorneys, subsidiaries and affiliates, and those persons in active concert or participation with any of them who receive actual notice of this Order, by personal service or otherwise, and each of them, be and hereby are temporarily restrained and enjoined from, directly or indirectly, unless Banc de Binary is registered with the SEC in accordance with Section 15(b) of Exchange Act, 15 U.S.C. § 78o(b), and in the absence of any applicable exemption, acting as a broker-dealer in the United States or otherwise making use of the mails or any means or instrumentality of interstate commerce to [1239]*1239effect any transactions in, or to induce or attempt to induce the purchase or sale of, any security (other than an exempted security or commercial paper, bankers’ acceptances, or commercial bills) in the United States, in violation of Section 15(a) of the Exchange Act, 15 U.S.C. § 78o(a).
IT IS FURTHER ORDERED that, except as otherwise ordered by this Court, Banc de Binary, and its officers, agents, servants, employees, attorneys, subsidiaries and affiliates, and those persons in active concert or participation with any of them, who receive actual notice of this Order, by personal service or otherwise, and each of them, be and hereby are temporarily restrained and enjoined from, directly or indirectly destroying, mutilating, concealing, transferring, altering, or otherwise disposing of, in any manner, any documents, which includes all books, records, computer programs, computer files, computer printouts, contracts, emails, correspondence, memoranda, brochures, or any other documents of any kind in their possession, custody or control, however created, produced, or stored (manually, mechanically, electronically, or otherwise), pertaining in any manner to Banc de Binary or its activities.
IT IS FURTHER ORDERED that this Preliminary Injunction shall remain in effect until entry of a Final Judgment in, or other final disposition of, this action.
IT IS FURTHER ORDERED that this Court shall retain jurisdiction over this action for the purpose of implementing and carrying out the terms of all orders and decrees which may be entered herein and to entertain any suitable application or motion for additional relief within the jurisdiction of this Court.
IT IS SO ORDERED.