Ambac (ABK) Big loss for quarter. Falls to $3.08 from 52-week high of $96.10.

Arrow Electronics (ARW) Drop off in first quarter profit. Sells down to $26.58 from 52-week high of $44.95.

McClatchy Newspapers (MNI) Newspapers keep losing ground. Drops to $7.93 from 52-week high of $34.32.

Continental Airlines (CAL) Big losses from more airlines. Dips to $15.82 from 52-week high of $40.91.

Northwest (NWA) Another airline casualty. Sells down to $7.06 from 52-week high of $26.50.

South Financial Group  (TSFG) First quarter loss. Drops to $7.75 from 52-week high of $24.79.

Daktronics (DAKT) Cuts outlook on delayed bookings. Sells down to $13.88 from 52-week high of $32.37.