The top after-market NYSE gainers Thursday were Media General, Genco Shipping & Trading, Tempur-pedic International, EXCO Resources and EPAM Systems Inc. The top after-market NYSE losers were M/I Homes, Stage Stores Inc, Kronos Worldwide, NGL Energy Partners and Navistar International Corp.

Gainers

Media General Inc. (MEG) shares climbed 13.93 percent to $4.58 in post-market trading. The stock has a 52-week low of $3.02, a 52-week high of $6.84 and $112.28 million in market capitalization.

Genco Shipping & Trading Ltd. (GNK) shares climbed 6.14 percent to $3.63 in post-market trading. The company stock plunged more than 5 percent in regular trading.

Tempur-pedic International Inc. (TPX) shares gained 2.90 percent to $30.85 in post-market trading. The company stock was upgraded to a “neutral” rating from an “underperform” rating at Zacks Tuesday.

EXCO Resources Inc. (XCO) shares rose 2.15 percent to $7.14 in post-market trading. The stock has a 52-week low of $5.65, a 52-week high of $10.84 and $1.51 billion in market capitalization.

EPAM Systems Inc. (EPAM) shares advanced 2.01 percent to $19.31 in post-market trading. The company stock plunged nearly 2 percent in regular trading.

Losers

M/I Homes Inc. (MHO) shares plunged 4.37 percent to $24.06 in post-market trading. The company announced Thursday that Michael P. Glimcher, chairman of the board of trustees and chief executive officer of Glimcher Realty Trust, had been appointed to the M/I Homes Board effective Jan 1, 2013.

Stage Stores Inc. (SSI) shares plunged 3.59 percent to $23.10 in post-market trading. The company stock surged more than 3 percent in regular trading.

Kronos Worldwide Inc. (KRO) shares declined 3.40 percent to $18.47 in post-market trading. The stock has a 52-week low of $12.65, a 52-week high of $25.55 and $2.22 billion in market capitalization.

NGL Energy Partners LP (NGL) shares declined 2.22 percent to $21.74 in post-market trading. The stock has a 52-week low of $19.55, a 52-week high of $27.61 and $1.20 billion in market capitalization.

Navistar International Corp. (NAV) shares fell 2.11 percent to $20.60 in post-market trading. The company stock surged 4 percent in regular trading.