Today's Winners and Losers: Park Electrochemical

Shares of Entercom Communications(ETM Quote) were among the NYSE's winners Monday, climbing 11% after the radio station operator posted better-than-expected first-quarter results and boosted its stock buyback program.

The company earned $7.8 million, or 19 cents a share, on revenue of $91.1 million. Excluding certain items, the company earned 18 cents a share. Analysts polled by Thomson First Call expected earnings of 14 cents a share on revenue of $90.5 million. During the year-earlier quarter, the company earned $16.2 million, or 34 cents a share, on revenue of $94.3 million.

Excluding items, the company earned 26 cents a share during the year-earlier quarter. "First-quarter results were adversely affected by sluggish advertising conditions affecting all traditional media, exacerbated by weakness in the New Orleans and Boston markets," the company said.

Looking ahead, Entercom expects second-quarter net revenue, on a same-station basis, to drop by a mid-single-digit percentage from a year ago. Station operating expenses, meanwhile, are expected to fall about 1%.

Entercom, which called its stock "significantly undervalued," said it plans to purchase an additional $100 million in stock as part of its buyback program. During the first quarter, the company bought 2.6 million shares for $77.2 million. The shares recently were trading up $3.07 to $30.69.

Park Electrochemical(PKE Quote) shares rose 11% after the maker of printed circuit materials posted fiscal fourth-quarter earnings that blew past Wall Street's expectation. For the quarter ended Feb. 26, the company reported earnings of $5.7 million, or 28 cents a share, on revenue of $57 million.

Excluding items, the company earned $10.9 million, or 54 cents a share, well above analysts' estimate of 40 cents. During the year-earlier period, the company recorded adjusted earnings of $4.9 million, or 25 cents a share, on revenue of $51.2 million. Shares were trading up $3.63 to $36.19.