Morning Market Gainers

Piedmont Natural Gas Company, Inc. (NYSE: PNY) shares jumped 36.12 percent to $57.52, after the company agreed to be acquired by Duke Energy Corp (NYSE: DUK) for $ 4.9 billion in cash.Banco Macro SA (ADR) (NYSE: BMA) shares climbed 23.42 percent to $55.94, after the company received a consensus broker rating score of 2.00, representing Buy, from three brokers.Ctrip.com International, Ltd. (ADR) (NASDAQ: CTRP) shares surged 27.74 percent to $95.02, after the company agreed to a share swap and partnership with China's largest online travel network, Baidu Inc (ADR) (NASDAQ: BIDU).Pep Boys-Manny Moe and Jack (NYSE: PBY) spiked 22.67 percent to $14.95, following a rally on news of the company being acquired by Bridgestone.Grupo Financiero Galicia S.A. (ADR) (NASDAQ: GGAL) rose 17.09 percent to $24.86, after the company reported industry-leading revenue growth and robust gross margins. Lendingtree Inc (NASDAQ: TREE) shares surged 15.88 percent to $113.56, after the company reported its quarterly results ahead of expectations. Qunar Cayman Islands Ltd (NASDAQ: QUNR) shares rose 13.28 percent to $44.76, after Baidu exchanged shares of the company for newly-issued ordinary shares of Ctrip. Ardelyx Inc (NASDAQ: ARDX) shares gained 12.62 percent to $17.85, after the company presented clinical data for its lead product candidate, tenapanor, at the 2015 American College of Gastroenterology (ACG) Annual Meeting.Aptose Biosciences Inc (NASDAQ: APTO) shares rose 12.05 percent to $4.65, after the company's President and CEO presented at the 2015 BIO Investor Forum on October 20. Transportadora de Gas del Sur SA (ADR) (NYSE: TGS) rose 10.85 percent to $5.18, ahead of the company's quarterly earnings report.