Opening Top Percentage Gainers and Losers (TSTY, FLO, GLBC, LVLT, AMMD, ENDP, HRZ, CHLN, QUIK, CYH, THC, TDSC, AIB)

Best

1) Tasty Baking Company (NASDAQ: TSTY): Stock has jumped a resounding 146.58% to $3.97 after Flowers Foods (NYSE: FLO) revealed plans to buy the company for $4 per share in an all-cash arrangement.

2) Global Crossing (NASDAQ: GLBC): Vaulting 76.16% to $26.22 after Level 3 Communications (NASDAQ: LVLT) announced that it will acquire the company in an all-stock purchase (16 shares of Level 3 common stock for each share of Global Crossing common or preferred).

3) American Medical Systems (NASDAQ: AMMD): Surging 32.11% to $29.50 after agreeing to be acquired by Endo Pharmaceuticals (NASDAQ: ENDP) for $30 a share. The deal is worth 2.9 billion.

4) Horizon Lines (NYSE: HRZ): Getting a 21.71% boost to $2.13. On Friday the company agreed to a settlement regarding business practices with Puerto Rico, which ended up being one-third of the original amount. The company is currently pursuing options to refinance its debt to avoid default.

5) China Housing & Land Development (NASDAQ: CHLN): Shares are popping 18.1% to $2.48

Worst

1) QuickLogic (NASDAQ: QUIK): Stock is currently plunging 16.02% to $4.09 after cutting its first-quarter revenue forecast.

2) Community Health Systems (NYSE: CYH): Shares are down 13.78% to $34.75 in early trading after being accused of violations of Federal Securities Laws in a lawsuit filed by Tenet Healthcare (NYSE: TCH).

3) Tenet Healthcare (NYSE: THC): Equity is taking a 7.42% hit to $6.97 after filing a lawsuit against Community Health Systems (NYSE: CYH).

4) 3D Systems (NASDAQ: TDSC): Currently down 7.5% to $52.58.

5) Allied Irish Banks (NYSE: AIB): Extreme price moves continue in this name as the stock is currently trading 6.41% to the downside at $3.65.