Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
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Hospira Inc., up 34 cents to $89.85
Pfizer Inc. received regulatory clearance to move forward with its $15.23 billion buyout of the injectable drug device maker.
Chevron Corp., down $3.64 to $72.12
The oil company and its peers saw shares fall as oil prices continue to decline, falling to their lowest point in over five years.
Bank of America Corp., down 81 cents to $15.29
The bank holding company's stock was caught in the global downdraft triggered by the market a slump in China.
AGL Resources Inc., up $13.55 to $61.41
Southern Co. is buying the gas and electric utility for about $7.93 billion, creating the second-biggest utility in the U.S.
Cobalt International Energy Inc., up 74 cents to $7.98
The independent oil and gas exploration company is selling some oil assets for $1.75 billion.
Epizyme Inc., up $1.53 to $17.46
The Food and Drug Administration accepted the biotechnology company's plan to begin studies of a potential cancer treatment.
Yahoo Inc., down $1.62 to $31.31
The Internet company's stock was partly undercut by a downturn in China's Alibaba Group, in which Yahoo holds a sizeable stake.
Weibo Corp., down $2.49 to $9.67
The Chinese social media company saw shares decline as the Chinese stock market plunged over fears of an economic slowdown.