The Operating Committee has determined that “Trading Day” shall have the following meaning for all Eligible Securities. For Participant CAT Reporters the Trading Day is defined as the period beginning at 8:00 p.m. Eastern Time on the calendar day immediately preceding Regular Trading Hours and ending at 8:00 p.m. Eastern Time on the same calendar day as Regular Trading Hours. Regular Trading Hours shall have the meaning specified in Rule 600 of Regulation NMS of the Act for “regular trading hours.” 

For Industry Member CAT Reporters, Trading Day is defined as beginning immediately after 4:15:00 p.m. and no fractions of a second Eastern Time on one trade date and ending at exactly 4:15:00 p.m. and no fractions of a second Eastern Time on the next trade date.