The Chicago Board Options Exchange (CBOE), the world's largest options exchange, today announced that, effective immediately, option orders for Merck & Co. Inc. (ticker symbol MRK) of up to 250 contracts are now eligible for automatic execution on CBOE's Retail Automated Execution System (RAES). Previously, MRK orders of up to 50 contracts were eligible for automatic execution on RAES at CBOE. In addition, CBOE has implemented its new "dynamic quotes with size" system in MRK options, which disseminates continuously updated indications of the number of contracts available to be traded at the displayed bid and offer.
Wolverine Trading, LP is the Designated Primary Market Maker (DPM) for MRK options at CBOE. Average volume in MRK options at CBOE during the month of March was 4,339 contracts per day.
CBOE, the world's largest options marketplace and creator of listed options, is regulated by the Securities and Exchange Commission (SEC). For additional information about the CBOE and its products, access the CBOE site on the World Wide Web at http://www.cboe.com
