The stock market rose Friday on Friday as the labor department reported that nonfarm payrolls rose by 163,000 in the month of July. The Dow Jones Industrial Average is up 1.80%, the Nasdaq is up 2.01% and the S&P 500 is up 1.93%. The firm involved in Tuesday’s glitch on the New York Stock Exchange secured a credit line to keep operations running temporarily, sending the stock up. Another winner was an e-commerce company reporting better than expected second-quarter earnings. Meanwhile, second quarter earnings and guidance disappointments were the fate of both our biggest losers.

Here are Friday’s market winners and losers.

Biggest Winners

Shares of Mercadolibre, Inc. (NASDAQ: MELI) are up 23.62% to $82.23 on trading volume of 1.6 million shares. The e-commerce company reported second-quarter earnings of 57 cents a share, better than the 49 cents a share Wall Street analysts were expecting. The 52-week high is $104.50.

Shares of Knight Capital Group, Inc. (NYSE: KCG) are up 21.71% to $3.14 on trading volume of 37.1 million shares. After a trading glitch caused the company to lose a reported $440 million, news outlets report that the firm has secured a credit line to help it survive at least temporarily. The 52-week high is $14.00.

Biggest Losers

Shares of Zipcar, Inc. (NASDAQ: ZIP) are down 35% to $6.91 on trading volume of 2.7 million shares.  The company cut its 2012 revenue forecast to between $272 million and $278 million, down from $290 million to $296 million. Before Friday, the 52-week low was $8.87.

Shares of Molycorp, Inc. (NYSE: MCP) are down  26.96% to $11.74 on trading volume of 8 million shares. The mining company lost 71 cents a share in the second quarter, as analysts were expecting it to earn 3 cents a share. Before Friday, the 52-week low was $14.35.

Samuel Weigley

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