Is NYSE open on Columbus Day?

Yes Stock Market is open on Columbus day. Here is the NYSE Holiday Schedule 2008   New Year's Day January 1 Martin Luther King, Jr. Day January 21 Washington's Birthday/Presidents' Day* February 18* Good Friday March 21 Memorial Day May 26 Independence Day† July 4† Labor Day September 1 Thanksgiving Day† November 27† Christmas† December 25† 2009 New Year's Day January 1 Martin Luther King, Jr. Day January 19 Washington's Birthday/Presidents' Day* February 16* Good Friday April 10 Memorial Day May 25 Independence Day July 3 (observed) Labor Day September 7 Thanksgiving Day** November 26** Christmas** December 25**