东部4点收盘价。参见 https://www.theocc.com/components/docs/legal/rules_and_bylaws/occ_rules.pdf 关键词『regular trading hours』 RULE 805 - Expiration Exercise Procedure (j) The term "closing price", as used with respect to an underlying security in this Rule 805, means the last reported sale price for the underlying security during regular trading hours (as determined by the Corporation) on the trading day immediately preceding the expiration date, or on the expiration date if the expiration date is a trading day, on such national securities exchange or other domestic securities market as the Corporation shall determine. Notwithstanding the foregoing, if an underlying security was not traded on such market during regular trading hours on the trading day immediately preceding the expiration date, or if the underlying security was traded during regular trading hours on such trading day but the Corporation is unable to obtain a last sale price, the Corporation may, in its discretion, (i) fix a closing price on such basis as it deems appropriate in the circumstances (including, without limitation, using the last sale price during regular trading hours on the most recent trading day for which a last sale price is available) or (ii) suspend the application of subparagraph (d)(2) to option contracts for which that security is an underlying security. During the term of any such suspension, Clearing Members may exercise such option contracts only by giving affirmative exercise instructions in accordance with subparagraph (b) or (c). Adopted January 12, 1977. Amended November 7, 1977; September 20, 1982; May 28, 1985; March 12, 1986; October 18, 1995; February 23, 1999; May 26, 1999; August 3, 2001; May 22, 2003; July 12 , 2005.
【在 E***r 的大作中提到】 : 东部4点收盘价。参见 : https://www.theocc.com/components/docs/legal/rules_and_bylaws/occ_rules.pdf : 关键词『regular trading hours』 : RULE 805 - Expiration Exercise Procedure : (j) The term "closing price", as used with respect to an underlying security : in this Rule 805, : means the last reported sale price for the underlying security during : regular trading hours (as : determined by the Corporation) on the trading day immediately preceding the : expiration date, or