Market Madness will be held March 9 and 10 at the Ocean City Music Pier, Moorlyn Terrace and the Boardwalk. Created by the city's Boardwalk and Downtown Merchants Associations, it will offer two days of preseason shopping specials from local stores from 10 a.m. to 5 p.m. Saturday and 10 a.m. to 3 p.m. Sunday.