Women's-apparel retailer Christopher & Banks (CBK) sank on word CEO Matthew Dillon has resigned effective Aug. 30, to be replaced by Lorna Nagler of Lane Bryant. CIBC World Markets cut the Minneapolis-based company to sector perform from sector outperform.

Cost Plus (CPWM) took a 20% plunge on the heels of poor earnings and a major management change. The home-furnishings retailer broadened its fiscal second-quarter loss to 81 cents a share, or $18 million, from 64 cents a share last year (as restated), on a same-store-sales decline of 7.6%. Analysts were expecting the loss to widen by only a penny a share. The company also predicted a next-quarter per-share loss of 73 cents to 80 cents a share -- at least 28 cents short of the Street's target. In addition, the Oakland, Calif., concern announced the departure of Chief Financial Officer Thomas Willardson. Former Senior Vice President Jane Baughman will succeed him.

Delia's (DLIA), a direct-marketer and retailer of products for teenagers, posted a wider-than-expected loss of 16 cents a share. Analysts were looking for the loss to stay flat year over year at 12 cents a share.