chapter_41_var_covar

Thursday, May 31, 2007, 11:24AM ET - U.S. Markets close in 4 hours and 36 minutes. Dow Up 0.03% Nasdaq Up 0.29%PowerShares QQQ (QQQQ)Last Trade:Trade Time:Change:Prev Close:Open:Bid:Ask:NAV:At 11:09AM ET: 47.43 Up 0.24 (0.51%) 47.4311:09AM ETUp 0.24 (0.51%)47.1947.3247.42 x 4150047.43 x 37370046.74Thursday, May 31, 2007, 11:24AM ET - U.S. Markets close in 4 hours and 36 minutes. 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