Shares of Laureate Education ( LAUR - Get Report) were among the Nasdaq's winners Friday, climbing 17% after the education company posted second-quarter results that easily topped Wall Street's forecast.

Laureate posted earnings from continuing operations of $39.6 million, or 75 cents a share, on revenue of $303.1 million. Analysts polled by Thomson First Call expected earnings of 68 cents a share on revenue of $292.9 million. During the year-earlier quarter, the company earned $31.3 million, or 60 cents a share, on revenue of $227 million.

Looking ahead, Laureate sees third-quarter earnings of 19 cents to 21 cents a share, excluding stock-based compensation costs of 2 cents to 3 cents a share. The company predicts revenue of $240 million to $265 million. Analysts project earnings of 21 cents a share, including stock-based compensation costs, and revenue of $247.9 million. The company's shares recently were trading up $6.88 to $47.82.

Shares of Amcol International ( ACO) tumbled 18% after the mineral producer posted weaker-than-expected second-quarter results. The company earned $11.9 million, or 39 cents a share, on revenue of $152.7 million. Analysts polled by Thomson First Call expected earnings of 40 cents a share on revenue of $160.2 million. During the year-earlier quarter, the company earned $14.3 million, or 46 cents a share, on revenue of $136.3 million. The results during the year-earlier period included tax refunds that added 15 cents a share to the company's bottom line. Amcol shares were down $4.23 to $19.09.

Petroleum Development ( PETD) jumped 19% after the independent energy company agreed to sell some of its undeveloped property for $354 million. The company sold 8,700 acres in Colorado to Marathon Oil ( MRO - Get Report). "We believe this is a great transaction for both PDC and Marathon," Petroleum Development said. "Marathon acquired a high-quality natural gas prospect with great low-risk development potential, and PDC monetized an asset that the company would not have otherwise developed during the next five years or more." The company plans to use some of the proceeds to buy back up to 10% of its outstanding stock. Shares were trading up $6.56 to $39.88.

Shares of Capital One Financial ( COF - Get Report) declined 9% after the banking company's second-quarter profit fell short of analysts' expectation. Capital One earned $552.6 million, or $1.78 a share, up from $531.1 million, or $2.03 a share, a year earlier. Analysts, on average, expected earnings of $2.06 a share. The results were hurt by the company's U.K. business, which Capital One said is being hit by a worsening credit environment. The company recorded charges of 16 cents a share in incremental reserves and a write-down related to the U.K. operations.

Capital One backed its forecast for 2006 earnings of $7.40 to $7.80 a share. Analysts see earnings of $7.91 a share for the year. Shares recently were down $7.73 to $78.44.

First Data ( FDC) shares fell 4% after the provider of electronic commerce and payment services posted in-line second-quarter results and cautioned that immigration-reform activities could hurt its full-year results. The company earned $436.4 million, or 56 cents a share, including a one-time gain of a penny a share. Analysts expected earnings of 55 cents a share. First Data posted revenue of $2.87 billion, matching Wall Street's target. During the year-earlier period, the company earned $391.9 million, or 50 cents a share, on revenue of $2.6 billion. First Data said that its Western Union business was hurt by consumer reaction to immigration-reform activities in the U.S.

Looking ahead, First Data said that if U.S. immigration issues continue to affect the Western Union business, the company's full-year earnings will be at the low end of its previous guidance of $2.35 to $2.42 a share. Analysts project earnings of $2.38 a share. Shares were trading down $1.85 to $42.

Shares of Tempur-Pedic International ( TPX - Get Report) rose 5% after the mattress maker posted better-than-expected second-quarter results and lifted its full-year earnings forecast. The company's second-quarter profit rose to $26.1 million, or 30 cents a share, from $24.9 million, or 24 cents a share, a year earlier. Revenue grew to $219 million from $192.6 million. Analysts expected earnings of 29 cents a share on revenue of $217.2 million.

For 2006, Tempur-Pedic now expects earnings of $1.26 to $1.31 a share, up from an earlier view of $1.24 to $1.29 a share. The company continues to project revenue of $940 million to $970 million. Analysts forecast earnings of $1.26 a share and revenue of $930.1 million. Tempur-Pedic shares were up 66 cents to $14.11.

NYSE volume leaders included Advanced Micro Devices ( AMD), down $2.49 to $19.16; Halliburton ( HAL - Get Report), down $1.45 to $31.23; Pfizer ( PFE), up 17 cents to $23.88; General Electric ( GE), down 11 cents to $32.37; Citigroup ( C), down 22 cents to $46.89; Lucent Technologies ( LU), down 5 cents to $2.04; and Ford ( F), down 9 cents to $6.10.

Nasdaq volume leaders included Microsoft ( MSFT), up 95 cents to $23.80; Dell ( DELL), down $3.06 to $19.04; Intel ( INTC), up 23 cents to $17.33; Cisco Systems ( CSCO), down 33 cents to $17.55; Broadcom ( BRCM), down $2.26 to $24.09; JDSU ( JDSU), down 8 cents to $2.04; and Oracle ( ORCL), up 1 cent to $15.13.