20090423 Market, AdvIssues, DecIssues, UncIssues, AdvVol, DeclVol, UnchVol, NewHis, NewLows NYSE, 1866, 1202, 75, 1003885000, 552883000, 6116000, 3, 2 AMEX, 349, 181, 54, 7597000, 2790000, 826000, 3, 0 NASDAQ, 1044, 1663, 139, 1368039000, 1056065000, 27379000, 11, 4