US Stocks in Focus (GLBC, AMMD, LVLT, ENDP, BIIB, CYH, THC, TDSC)

Following are the US stocks that were actively trading in the Monday morning session. The stocks include Global Crossing, American Medical Systems, Level 3 and Community Health Systems.

Gainers

Global Crossing Limited (NASDAQ: GLBC) shares were up 55 percent, $8.13, to $22.93 after it agreed to be acquired by Level 3 Communications, Inc. (NASDAQ: LVLT) for about $1.9 billion in stock.

Shares of American Medical Systems Holdings (NASDAQ: AMMD) surged 32 percent, or $7.17, to $29.50 after it agreed to be bought by Endo Pharmaceuticals (NASDAQ:ENDP) for $2.9 billion.

Shares of Level 3 Communications, Inc. (NASDAQ: LVLT) after it struck a deal to buy Global Crossing Limited (NASDAQ: GLBC) for about $1.9 billion stock deal to boost its service portfolio.

Endo Pharmaceuticals (NASDAQ:ENDP) shares gained 6 percent to $43.16 after its deal to buy American Medical Systems Holdings (NASDSAQ: AMMD).

Shares of Biogen Idec Inc. (NASDAQ:BIIB) were up 6 percent, or $3.99, to $77.28 after its multiple sclerosis drug met goals in a late-stage study.

Losers

Community Health Systems, Inc. (NYSE: CYH) shares plunged 36 percent, or $14.46, to $25.84 after Tenet Healthcare (NYSE:THC) sued the hospital operator for overbilling insurers. Community Health Systems has been trying to buy Tenet Healthcare.

Tenet Healthcare (NYSE:THC) shares also fell 15 percent, or $1.17, to $6.38 after its lawsuit against Community Health Systems.

Shares of 3D Systems Corp.(NASDAQ: TDSC) were down 11 percent, or $6.15, to $50.37. During the past 52-weeks, the stock has been trading between $11.10 and $58.70.