Division of Trading and Markets:
Answers to Frequently Asked Questions Concerning Rule 10b-18 ("Safe Harbor" for Issuer Repurchases)
Oct. 12, 2017
Answers to these frequently asked questions were prepared by and represent the views of the staff of the Division of Trading and Markets (staff). They are not rules, regulations, or statements of the Securities and Exchange Commission (Commission). Further, the Commission has neither approved nor disapproved these interpretative answers.
For Further Information Contact: Josephine Tao, Assistant Director, Elizabeth Sandoe, Senior Special Counsel, John Guidroz, Branch Chief, or Joan Collopy, Special Counsel, in the Office of Trading Practices, Division of Trading and Markets, at (202) 551-5777.
Rule 10b-18, which was adopted in 1982, provides a voluntary "safe harbor" from liability for manipulation under Sections 9(a)(2) and 10(b) of the Securities Exchange Act of 1934 (Exchange Act), and Rule 10b-5 under the Exchange Act, when an issuer or its affiliated purchaser bids for or purchases shares of the issuer's common stock in accordance with the Rule 10b-18's manner, timing, price, and volume conditions.
On November 10, 2003, the Commission adopted amendments to Rule 10b-18 in order to simplify and update the safe harbor provisions in light of market developments since Rule 10b-18's adoption. Among other things, the amendments allow issuers of actively traded securities to stay in the market longer at the end of the trading day, extend the safe harbor to certain after-hours repurchases, apply a uniform pricing condition for all issuers, increase the volume limit following a market-wide trading suspension, modify the block exception, and clarify the scope of the safe harbor with regard to mergers, acquisitions, and similar transactions. To enhance the transparency of issuer repurchases, the Commission also adopted amendments to Regulations S-K and S-B under the Exchange Act, Exchange Act Forms 10-Q, 10-QSB, 10-K, 10-KSB, and 20-F (regarding foreign private issuers), and Form N-CSR under the Exchange Act and the Investment Company Act of 1940, which require periodic disclosure of all issuer repurchases of equity securities, regardless of whether the repurchases are effected in accordance with Rule 10b-18. For information or questions with respect to the disclosure amendments, please contact Sean Harrison, Special Counsel, Office of Rulemaking, Division of Corporation Finance, at (202) 942-2900.
The staff has compiled the following questions and answers regarding Rule 10b-18 to assist in the application and operation of the safe harbor. The questions and answers do not necessarily contain a discussion of all material considerations necessary to reach the conclusions stated. Consequently, these questions and answers are intended to provide general guidance, but do not constitute formal interpretations of Rule 10b-18. The facts and circumstances relating to a particular transaction may vary and the staff notes that even slight variations may cause different answers. The Commission is not bound by these statements and may interpret Rule 10b-18 as it deems necessary or appropriate in the public interest for the protection of investors.
The Division may update these questions and answers periodically by marking each modified or new question and answer as "modified" or "new."
II. Answers to Frequently Asked Questions
Question 1: If an issuer executes purchases that are in technical compliance with the safe harbor conditions, will that protect the issuer from all liability for such purchases?
Answer: No. Some issuer repurchase activity that meets the safe harbor conditions may still violate the anti-fraud and anti-manipulation provisions of the Exchange Act. For example, Rule 10b-18 confers no immunity from possible Rule 10b-5 liability where the issuer engages in the repurchases while in possession of material, non-public information concerning its securities, or where purchases are part of a plan or scheme to evade the federal securities laws. Therefore, regardless of whether an issuer's repurchases technically satisfy the conditions of Rule 10b-18, the safe harbor would not be available if the repurchases are fraudulent or manipulative, when all the facts and circumstances surrounding the repurchases are considered (i.e., facts and circumstances in addition to the volume, price, time, and manner of the repurchases). For example, the safe harbor would not be available if the repurchases are made as part of a manipulative scheme to influence the closing price of a company's securities, or are done to mask other motives, such as inflating or manipulating short-term earnings.
Question 2: Is the safe harbor of Rule 10b-18 available for purchases by the issuer of securities other than common stock, e.g., preferred stock, warrants, options, or convertible debt?
Answer: No. The Rule 10b-18 safe harbor only applies to open market purchases by an issuer of its common stock (or an equivalent interest, including a unit of beneficial interest in a trust or limited partnership or a depository share). It does not apply to any other type of security -- even if related to the common stock (e.g., transactions in derivative securities such as warrants, options, or single stock futures).
Question 3: Is the safe harbor available for an issuer who effects both open market and privately negotiated repurchases on the same day?
Answer: Yes. An issuer may effect privately negotiated repurchases (which are outside the safe harbor) without jeopardizing the availability of the safe harbor for its open market repurchases. However, the issuer must consider the applicability of the general anti-fraud and anti-manipulation provisions under the Exchange Act and of any other relevant federal or state law regarding its privately negotiated repurchases.
Question 4: Is the Rule 10b-18 safe harbor available to an issuer who instructs its broker-dealer to effect purchases in compliance with the safe harbor if the purchases fail to satisfy the conditions of the Rule?
Answer: No. To come within the safe harbor the purchases must satisfy the Rule's manner, timing, price, and volume conditions. Failure to meet any one of the four conditions will disqualify the issuer's purchases from the safe harbor for the day.
Question 5: The primary market for an issuer's common stock is in the United States. However, the stock is also traded in one or more foreign markets. Is the safe harbor available for the issuer's purchases outside the United States?
Answer: No. The issuer may not claim the safe harbor for repurchases made outside the United States; nor is foreign trading volume included in a security's ADTV calculation for purposes of applying the safe harbor.
Question 6: Is the safe harbor available to an issuer that effects Rule 10b-18 purchases of its common stock throughout the day in accordance with the safe harbor conditions, but effects an open market purchase (otherwise eligible for the safe harbor) of its common stock at the end of the day outside the safe harbor limitations?
Answer: No. To come within the safe harbor, an issuer's repurchases must satisfy (on a daily basis) each of Rule 10b-18's four conditions. Failure to meet any one of the four conditions removes all of the issuer's repurchases from the safe harbor for that day.
Question 7: Is compliance with Rule 10b-18 the exclusive means by which issuers may repurchase its stock in the market without engaging in manipulation?
Answer: No. Rule 10b-18 does not mandate the terms under which an issuer may repurchase its shares without engaging in manipulation. Rather, Rule 10b-18 sets forth conditions with which issuers must comply in order to obtain a safe harbor from liability for manipulation. Paragraph (d) of Rule 10b-18 expressly provides that there is no presumption of manipulation simply because the issuer's purchases do not satisfy the Rule's conditions.
Question 8: Is the Rule 10b-18 safe harbor available for repurchases by an issuer with two separate classes of common stock publicly traded?
Answer: Yes. The issuer must treat each class of common stock separately for purposes of Rule 10b-18.
Question 9: If the issuer repurchases shares in a privately negotiated (off-market) transaction, are these shares included in its 25% ADTV limit for that day?
Answer: No. Rule 10b-18 does not cover privately negotiated (off-market) repurchases, nor are these shares counted in an issuer's daily volume limitation.
Question 10: Is the safe harbor available for repurchases of OTCBB and Pink Sheet securities?
Question 11: Is the safe harbor available to an issuer who recently conducted an initial public offering?
Answer: No, the issuer would have to wait until four weeks after its securities began to trade in order to claim the safe harbor. This is because Rule 10b-18's volume condition is predicated upon trading in the common stock for four full calendar weeks preceding the week in which the purchase is to be effected.
Question 12: Are Nasdaq Small Cap, OTCBB, and Pink Sheet securities reported in the "consolidated system" for purposes of applying Rule 10b-18's price condition?
Answer: Of the three, only Nasdaq Small Cap securities are reported in the "consolidated system" (i.e., a system that collects and publicly disseminates on a current and continuous basis transaction or quotation information in common equity securities pursuant to an effective transaction reporting plan or a national market system plan). Bids and last sale prices for OTCBB and Pink Sheet securities are displayed and disseminated on an "inter-dealer quotation system," as defined in Exchange Act Rule 15c2-11(e)(2), that displays at least two independent priced quotations for the security. For all other eligible securities, the issuer would need to look to the highest independent bid obtained from three independent dealers (i.e., the "three quote rule").
Question 13: Is the Rule 10b-18 safe harbor available for an issuer and the broker-dealer who engage in an accelerated share repurchase plan or use a forward contract to repurchase the issuer's stock?
Answer: Accelerated share repurchase plans and forward contracts are private (off-market) transactions. Therefore, they are not eligible for the Rule 10b-18 safe harbor, which applies only to open market purchases. Moreover, the Rule 10b-18 safe harbor also is not available for the broker's covering transactions, as these transactions are not agency or riskless principal trades effected on behalf of the issuer.
Question 14: With regard to the "merger exclusion," how do you calculate the three full calendar month "look back" period?
Answer: The calendar months run from the first of the month until the end of the month, so that if a merger were announced on January 15, 2004, an issuer would look back to its Rule 10b-18 repurchase activity during the three full calendar months of October, November, and December.
Question 15: With respect to the "merger exclusion," if 25% of an issuer's ADTV in its stock is 50,000 shares, and the issuer's previous Rule 10b-18 repurchase activity during the three full calendar months prior to the date of announcement of a merger is an average of 10,000 shares per day, how many shares can the issuer repurchase within the safe harbor once the merger is announced?
Answer: Because the issuer is limited to repurchasing the lesser of 25% of the ADTV in its securities, or the daily average amount of its own Rule 10b-18 repurchase activity during the past three months prior to the date of announcement of the merger, the issuer may purchase 10,000 shares per day.
Question 16: If an issuer has just announced a merger, can the issuer rely on Rule 10b-18's amended "one block per week" exception during this post-announcement period?
Answer: Yes, so long as the issuer does so in accordance with its prior reliance on the amended "one block per week" exception during the three-month "look back" period.
Question 17: Does the three-month "look back" period include "black out" periods (i.e., periods in which the company refrains from repurchasing its shares because of insider trading concerns) that may be self-imposed by the issuer?
Answer: Yes. The three-month "look back" period includes any "black out" periods that may have been self-imposed by the issuer.
Question 18: Does the "merger exclusion" apply to both the acquiring company (repurchasing its own shares and the target's shares), as well as the target company (repurchasing its own shares and the acquiring company's shares)?
Answer: Yes. During the post-announcement period, neither the acquiring company nor the target company would have the safe harbor available (other than in accordance with their pre-announcement Rule 10b-18 repurchase history) during this period for any repurchases of the acquiring company's or the target company's securities.
Question 19: How is the time period "completion of the vote by target shareholders" measured if there are two different dates for the respective companies' shareholder votes?
Answer: The "merger exclusion" would extend until both shareholder votes have occurred.
Question 20: An acquiror and a target company have signed a merger agreement. Would the target be an "affiliated purchaser" of the acquiror?
Answer: Yes. The target company would be considered an "affiliated purchaser" of the acquiror with respect to purchases of the acquiror's securities after the signing of a merger agreement.
Question 21: If an issuer announces a merger on February 15, would the issuer be able to include trading volume that occurred in its securities during the first two weeks of February?
Answer: For purposes of calculating the issuer's ADTV in its securities, an issuer would always need to look to the trading in its securities during the four calendar weeks preceding the week of the repurchase (i.e., the four full trading weeks immediately prior to the week containing February 15 in the above example). With respect to the three-month "look back" provision, the period would be the three full calendar months prior to February 15 (i.e., November 1 through January 31).
Question 22: If an issuer has not made any Rule 10b-18 purchases during the three-month "look back" period prior to the announcement of a merger (or similar transaction), will it be permitted to effect Rule 10b-18 purchases during the post-announcement period?
Answer: No. If an issuer did not make any Rule 10b-18 purchases during the three-month period prior to the announcement of a merger or similar transaction, it would not be permitted to make any Rule 10b-18 purchases in the post-announcement period.
Riskless Principal Transactions
Question 23: If a broker-dealer receives an order from an issuer to repurchase the issuer's common stock in the open market within the safe harbor limitations, can the broker purchase shares in the open market at $10.10 and resell them to the issuer at $10.12 and still be within the safe harbor?
Answer: No. The safe harbor is available only for riskless principal transactions where both legs of the transaction are effected at the same price.
Question 24: An issuer's employee stock option plan (ESOP) is administered by a board of directors including officers and directors of the issuer. The ESOP purchases shares of the issuer's common stock in the open market. How should those purchases be treated under the Rule?
Answer: The ESOP would be deemed an affiliated purchaser of the issuer. Any purchases it effects could qualify for the safe harbor if all of the conditions are met. The ESOP's and the issuer's purchases would have to be effected through the same broker or dealer and all their repurchases would have to be aggregated to determine whether the volume limitation has been met. However, the safe harbor would not be available if the ESOP purchases are effected by or for the ESOP by an "agent independent of the issuer."
Single Broker or Dealer Condition
Question 25: A broker or dealer contacts an issuer to offer stock shortly after the issuer announces the initiation of a repurchase program. The broker or dealer is not acting as the issuer's agent for the repurchase program. Can the transaction between the issuer and broker or dealer comply with Rule 10b-18's single broker or dealer condition even though the issuer has already retained another broker to effect Rule 10b-18 purchases that day?
Answer: Rule 10b-18 requires that the issuer use only one broker or dealer for purchases of its stock on a single day (the "single broker or dealer" condition). This condition, however, does not apply to purchases that are not solicited by or on the behalf of the issuer. An issuer may purchase from any number of brokers or dealers in transactions not involving a solicitation by the issuer. Although the term "solicited" is not defined in the Rule, disclosure and announcement of a repurchase program would not necessarily cause subsequent purchases to be considered solicited. Whether a transaction has been solicited necessarily depends on the facts and circumstances of each case. An issuer must make all its solicited purchases through the same broker or dealer on a given day in order to comply with the "single broker or dealer" condition.
Question 26: The amended timing limitation applies an ADTV value test and a public float value test in determining how long an issuer must be out of the market before the scheduled close of trading. How does an issuer calculate its ADTV value and its public float value?
Answer: In calculating the dollar value of ADTV, any reasonable and verifiable method may be used. For example, it may be derived from multiplying the number of shares (i.e., publicly reported for a security during the four calendar weeks preceding the week in which the Rule 10b-18 purchase is effected) by the price in each trade, or from multiplying each day's total volume of shares by the closing price on that day. "Public float value" (i.e., the aggregate market value of common equity securities held by non-affiliates of the issuer) is to be determined in the manner set forth on the front page of Form 10-K, even if the issuer of such securities is not required to file Form 10-K. For reporting issuers, the public float value should be taken from the issuer's most recent Form 10-K or based upon more recent information made available by the issuer.
Question 27: Is the safe harbor available for issuer repurchases effected after the close of the regular trading session?
Answer: Yes. A limited safe harbor is available for Rule 10b-18 repurchases effected after the close of the primary trading session until the termination of the period in which last sale prices are reported in the consolidated system. The Rule 10b-18 purchase must not be the opening transaction of the after-hours trading session, and must be made at a price that does not exceed the lower of the closing price of the primary trading session in the principal market for the security and any lower bid or sale prices subsequently reported in the consolidated system. The issuer must also stay within the Rule's volume limitation, but may use a different broker or dealer to effect after-hours purchases from that used for purchases during the primary trading session.
Question 28: If an issuer wants to repurchase its securities within the protection of the Rule 10b-18 safe harbor, can the issuer participate in its security’s principal market’s larger official opening purchase if there has already been an (albeit much smaller) opening purchase in the issuer’s security reported in the consolidated system that day?
Answer: To satisfy Rule 10b-18(b)(2)(i)’s opening timing condition, an issuer’s Rule 10b-18 purchase must not be the opening (regular way) purchase reported in the consolidated system (as defined in paragraph (a)(6) of the Rule). Thus, if there is, for example, a delayed opening in the principal market on a particular day, and one of the regional exchanges reports a much smaller opening purchase in the consolidated system first that day, the issuer may be able to participate in the principal market’s opening purchase that day and still stay within the Rule’s opening timing limitation. However, the issuer may still want to avoid the principal market’s opening purchase if it is not clear which opening purchase is likely to be the first opening purchase reported in the consolidated system on a particular day. As with compliance with Rule 10b-18 in general, the issuer must also be careful that its participation is not part of a manipulative scheme to influence the opening price of its securities, or to unduly influence the direction of trading in its securities that day.
Question 29: An issuer's common stock is a Nasdaq NMS security. The highest current independent published bid is $10.10; the last independent transaction price reported was $10.15; and the offer is quoted at $10.20. Can the issuer pay a price equivalent to the average between the last independent transaction price and the offer, or any price in between those two?
Answer: No. To qualify for the safe harbor, the issuer cannot pay a price higher than the highest current independent published bid or the last independent transaction price, whichever is higher, reported or quoted in the consolidated system. The offer price is irrelevant for purposes of determining the maximum permissible price for a Nasdaq NMS security. In this case the issuer can pay up to $10.15 for its common stock.
Question 30: An issuer's common stock is quoted at $10.10 bid and $10.15 offer. The last transaction was reported at $10.15. The issuer places a bid for its stock. A new last transaction price is reported at $10.12. Can the issuer pay $10.15 for its purchase?
Answer: No. The issuer can only pay the higher of the highest current independent published bid or the last independent transaction price reported. In this case, the last independent transaction price reported prior to the execution of the issuer's order is $10.12. Because the bid is $10.10, the highest price the issuer may pay is $10.12.
Question 31: An issuer's common stock is a Nasdaq NMS security. Market maker #1 has bid $10.15 for the stock; market maker #2 has a bid at $10.19. The last independent transaction reported was at 10.16. What price can the issuer pay for its purchase?
Answer: The issuer cannot pay a price higher than the highest current independent published bid or the last independent transaction price reported. In this case, the highest independent published bid is $10.19 and the last independent transaction price is $10.16. The maximum price the issuer may pay is $10.19; however, the price paid must be exclusive of any commission paid to a broker acting as agent, or commission equivalent, mark-up, or differential paid to the dealer.
Question 32: In order to qualify for the safe harbor, must Rule 10b-18's conditions be satisfied at the time the order is entered, or at the time the order is executed?
Answer: In order to qualify for the safe harbor, Rule 10b-18's conditions must be satisfied at the time the order is executed.
Question 33: Can an “odd-lot” transaction (i.e., a transaction with a size of less than one round lot in an NMS security) be used as an “independent transaction price” for purposes of applying Rule 10b-18(b)(3)’s price condition? For example, an issuer wants to repurchase its stock within the safe harbor and the highest independent bid quoted for the issuer’s security is $10.10 and the last independent transaction price reported in the consolidated system for the security is $10.15. If, prior to the execution of the issuer’s order, a higher-priced odd-lot transaction is subsequently reported in the consolidated system at $10.18, can the issuer pay up to $10.18 for its stock and still stay within the safe harbor?
Answer: No. To satisfy the safe harbor’s price condition, an issuer cannot pay a price higher than the highest independent bid or the last independent transaction price, whichever is higher, quoted or reported in the consolidated system. While odd-lot transactions are reported in the consolidated system, they are not used for purposes of updating the last sale price in the consolidated system. Therefore, the reported odd-lot transaction price of $10.18 (in the above example) would not qualify as an appropriate last sale reference price for purposes of applying Rule 10b-18(b)(3)’s price condition. The issuer may, however, include the reported odd-lot transaction in calculating its security’s four-week average daily trading volume (or “ADTV”).
Question 34: How has the volume condition changed under the amended Rule 10b-18?
Answer: Under the amended Rule 10b-18, an issuer's total repurchases on any single day, including its block-size purchases, must satisfy the Rule's 25% ADTV volume limitation. However, an issuer can include its block-size purchases when calculating its security's four-week ADTV. As amended, Rule 10b-18 also provides issuers with a choice when making any particular block purchase. Either the block purchase must comply with the 25% ADTV volume condition, like any other repurchase, or the block purchase need not comply with the volume condition, but the issuer can make no other repurchases on that day and all other block purchases effected during that week must comply with the 25% volume condition.
Question 35: An issuer's 25% ADTV limit on a particular day is 25,000 shares. If the issuer purchases 10,000 shares, can the issuer also buy a block of 15,000 shares on the same day and still fit within the safe harbor for that day?
Answer: Yes, as long as the issuer did not purchase any more of its shares that day, the issuer would still be within its 25% ADTV limit of 25,000 for that day.
Question 36: If an issuer relies on the "one block per week" exception, would the issuer be able to include the block in its four-week ADTV calculation?
Answer: No. An issuer must deduct those shares from its four-week ADTV calculation.
Question 37: If an issuer is applying the “one block per week” exception to the volume condition in Rule 10b-18 and wants to rely on paragraph (a)(5)(iii) of the Rule, which defines a “block” to include a quantity of stock that is at least 20 round lots of the security and totals 150 percent or more of the trading volume for that security, is the issuer permitted to look to its security’s four-week ADTV in calculating whether its block-sized purchase constitutes 150 percent or more of the trading volume for that security?
Answer: Yes. An issuer may look to its security’s ADTV during the four calendar weeks preceding the week of the repurchase for purposes of determining whether its block-sized purchase constitutes 150 percent or more of the trading volume for its security.
Question 38: An issuer purchases a block on Friday relying on the "one block per week" exception to the volume condition. Is the safe harbor available to that issuer the following Monday, if the issuer purchases a block that Monday, in lieu of purchasing under the 25% ADTV limit?
Answer: Yes. The "one block per week exception" applies to a calendar week. Thus, the "one block per week" exception would be available for the block purchased on Friday and the block purchased the following Monday, provided no other Rule 10b-18 purchases are made the following Monday, and all other conditions under Rule 10b-18 are met.
Question 39: If no trading occurs in an issuer's common stock for one or more trading days during the four calendar weeks preceding the week in which the Rule 10b-18 repurchase is effected, how should the issuer's ADTV in its shares be calculated?
Answer: For trading days when no trading in the issuer's stock took place, a zero is added to the numerator of the ADTV calculation. The denominator is the total number of trading days, including those days when the trading volume was zero, during the four-calendar week period. However, if no trading occurred because a certain day was a holiday and the markets were closed, then that day would not be included in the denominator.
Question 40: An issuer's 25% ADTV limit on a particular day is 25,000 shares. If the issuer repurchased 15,000 shares, could the issuer buy a block of 30,000 shares (under the "one block per week" block exception to Rule 10b-18's volume condition) that same day and still fit within the safe harbor?
Answer: No. Because the issuer already repurchased 15,000 shares that day, the issuer would be precluded from repurchasing under the "one block per week" exception. An issuer must choose to either buy a block of shares or repurchase within its 25% ADTV limit, but may not do both. A block-size purchase of 10,000, however, is permissible because it would not exceed the issuer's 25% ADTV limit (i.e., 25,000 shares) for that day.
Question 41: An issuer contacts a broker-dealer who owns a large amount of stock not constituting a block. The issuer is aware that the broker-dealer owns shares not amounting to a block. Can the broker-dealer purchase additional stock to create a block in order to take advantage of the "one block per week" exception?
Answer: No. The volume limitation cannot be avoided by having the broker-dealer purchase additional stock to meet the block definition. The block definition provides that a block shall not include any amount that a broker or dealer, acting as principal, has accumulated for the purpose of sale or resale to the issuer, if the issuer knows or has reason to know that such amount was accumulated for such purpose.
Question 42: A market maker acquires 2,000 shares of an issuer's common stock in market making activities during one week. The following week, it acquires another 3,000 shares. Can the market maker offer a 5,000 share block to the issuer?
Answer: The Rule 10b-18 definition of "block" excludes any amount that a broker or dealer, acting as principal, has accumulated for the purpose of sale or resale to the issuer if the issuer knows or has reason to know that the market maker had accumulated the block for the purpose of reselling it to the issuer. Therefore, the issuer could not avoid the volume limitation by treating the purchase as a block.
 17 CFR 240.10b-18. See also Securities Exchange Act Release No. 19244 (November 17, 1982), 47 FR 53333, 53334 (November 26, 1982).
 See Securities Exchange Act Release No. 48766 (November 10, 2003), 68 FR 64952 (November 17, 2003) (also available at http://www.sec.gov/rules/final/33-8335.htm).
 See, e.g., Preliminary Note No. 1 to Rule 10b-18 at 17 CFR 240.10b-18 (providing that the safe harbor is “not available for repurchases that, although made in technical compliance with the section, are part of a plan or scheme to evade the federal securities laws”); see also Securities Exchange Act Rel. No. 61414 (Jan. 26, 2010), 75 FR 4713 (Jan. 29, 2010) (noting that the opening transaction in the principal market for a security can be a significant indicator of the direction of trading, strength of demand, and the current value of a security -- especially in view of the large trading volume that can occur at the principal market’s open of trading).
 See, e.g., Securities Exchange Act. Rel. No. 70794 (Oct. 31, 2013), “Consolidated Tape Association Order Approving the Eighteenth Substantial Amendment to the Second Restatement of the CTA Plan,” at https://www.sec.gov/rules/sros/nms/2013/34-70794.pdf (stating that odd-lot transaction would not be included in calculations of last sale prices).
 See 17 CFR 240.10b-18(a)(5)(iii).