Today's Winners and Losers: Headwaters

Shares of Headwaters(HW Quote) were among the NYSE's losers Thursday, falling 7% after the natural-resources company cut its 2006 earnings forecast.

The company now sees earnings of $2 to $2.70 a share, down from an earlier view of $2.60 to $2.75 a share. Analysts polled by Thomson First Call project earnings of $2.64 a share. "Due to the uncertainty surrounding oil prices and legislative action, we believe it is prudent to widen the band of our earnings forecast for the 2006 fiscal year," Headwaters said. Shares were trading down $2.05 to $29.35.

Home Depot(HD Quote) rose 1% after the home-improvement retailer boosted the number of shares it could buy under its stock-repurchase plan. The company is now authorized to buy up to $14 billion in stock, up from $12 billion. What's more, the company plans to immediately repurchase $2 billion in stock through an accelerated buyback. Home Depot signed an agreement with Lehman Brothers to immediately buy about 53 million shares. Shares were trading up 37 cents to $38.38.

Shares of Gymboree(GYMB Quote) rose 4% after the children's-clothing retailer posted better-than-expected first-quarter earnings. The company earned $17.9 million, or 53 cents a share, on revenue of $188.9 million. Analysts expected earnings of 46 cents a share, with revenue of $189.3 million. A year earlier, the company recorded earnings from continuing operations of $5.3 million, or 17 cents a share, on revenue of $163 million.

For the second quarter, Gymboree sees a loss of 7 cents to 9 cents a share. Analysts project a loss of 10 cents a share. Shares were trading up $1.39 to $34.34.

Shares of Barnes & Noble(BKS Quote) slid 5% after the bookseller reported mixed first-quarter results and a tepid second-quarter guidance. Barnes & Noble's first-quarter profit rose slightly to $10 million, or 14 cents a share, from $9.9 million, or 13 cents a share, a year earlier. Analysts expected earnings of 13 cents a share. Sales rose to $1.11 billion from $1.10 billion, shy of analysts' forecast of $1.14 billion. Same-store sales at its namesake chain declined 0.3%, while same-store sales at the B. Dalton chain fell 1.8%.