Monday's Winners & Losers: Ceradyne

Deluxe said the lower guidance reflects a pretax impairment charge of $45 million, or 56 cents a share, related to the abandonment of a software project. The company also blamed performance shortfalls in each segment and moves to improve its cost structure. "We are extremely disappointed in how the second quarter is coming in," the company said. Shares, which fell 18% Friday, recently were down another $2.24, or 13%, to $15.38.

Michaels Stores(MIK Quote) rose 2% after the arts-and-crafts retailer agreed to be acquired by private equity firms Bain Capital and the Blackstone Group for $44 a share, or more than $6 billion. The price reflects a 7% premium to Friday's closing price of $41.24 a share, and a 30% premium to its March 17 close, the last trading day before the company said it was seeking strategic alternatives. Bain and Blackstone will own equal stakes in the retailer after the deal's close, which is expected to occur by the end of the year. Michaels shares were trading up 76 cents to $42.

Shares of Wal-Mart(WMT Quote) fell 2% after the retailer said same-stores sales for June came in 1.2%, the low end of its previous guidance. Previously, the company projected growth of 1% to 3%. Shares were trading down 89 cents to $47.28.

NYSE volume leaders included Lucent Technologies(LU Quote), up 2 cents to $2.44; Ford(F Quote), down 24 cents to $6.69; General Motors(GM Quote), down 37 cents to $29.42; Pfizer(PFE Quote), unchanged at $23.47; Nortel Networks(NT Quote), up 12 cents to $2.36; EMC(EMC Quote), down 15 cents to $10.82; and General Electric(GE Quote), up 22 cents to $33.18.

Nasdaq volume leaders included Intel(INTC Quote), up 25 cents to $19.25; Microsoft(MSFT Quote), up 31 cents to $23.61; Cisco Systems(CSCO Quote), up 35 cents to $19.88; Millicom(MICC Quote), down $12.57 to $32.86; and JDSU(JDSU Quote), down 4 cents to $2.49.