20090414 Market, AdvIssues, DecIssues, UncIssues, AdvVol, DeclVol, UnchVol, NewHis, NewLows NYSE, 957, 2132, 89, 517413000, 1202295000, 21218000, 4, 9 AMEX, 252, 305, 66, 5446000, 7507000, 1505000, 2, 1 NASDAQ, 910, 1870, 128, 800552000, 1408432000, 22318000, 10, 7