NYSE
U.S. stocks dropped on Friday as the most recent flare-up in Greek negotiations for a financial bailout package put the S&P 500 on track to snap a three-day winning streak. REUTERS

The top after-market NYSE gainers Friday were: Telecom Argentina, Banco Macro, Black Hills, World Wrestling Entertainment and Vocera Communications. The top after-market NYSE losers were: Magnum Hunter Resources, Perini Corp, Beazer Homes, Yelp and GFI Group.

Gainers

Telecom Argentina S.A. (TEO) shares advanced 4.20 percent to $10.42 in post-market trading. The company stock slumped more than 8 percent in regular trading.

Banco Macro S.A. (BMA) shares gained 3.83 percent to $12.20 in post-market trading.

Black Hills Corp. (BKH) shares rose 2.55 percent to $33.39 in post-market trading. The stock has a 52-week low of $25.83, a 52-week high of $35.82 and $1.44 billion in market capitalization.

World Wrestling Entertainment, Inc. (WWE) shares advanced 2.54 percent to $7.68 in post-market trading.

Vocera Communications, Inc. (VCRA) shares rose 2.52 percent to $24.72 in post-market trading. The company stock plunged more than 4.5 percent in the regular session.

Losers

Magnum Hunter Resources Corp. (MHR) shares slumped 7.46 percent to $3.97 in post-market trading. The company stock climbed more than 8 percent in regular trading.

Perini Corp. (TPC) shares plunged 5.67 percent to $11.14 in post-market trading.

Beazer Homes USA, Inc. (BZH) shares fell 4.89 percent to $2.53 in post-market trading session.

Yelp Inc. (YELP) shares fell 4.86 percent to $20.10 in post-market trading. The company stock climbed more than 6 percent in regular trading after announcing that it will begin featuring content on Bing Local search pages.

GFI Group Inc. (GFIG) shares fell 4.34 percent to $3.28 in aftermarket trading. The company stock climbed more than 12 percent in regular trading.

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