NEW YORK (AP) -- Standard & Poor's said Tuesday it would bump up Atmos Energy Corp. into its S&P MidCap 400 index on Oct. 13, replacing Sepracor Inc., which is being acquired by Dainippon Sumitomo Pharma Co. Ltd.
Replacing Atmos on the S&P SmallCap 600 will be Monro Muffler Brake Inc.
The ratings agency also said it would replace the smallest two companies on its S&P SmallCap 600, Cascade Bancorp and Frontier Financial Corp., with USA Mobility Inc. and BJ's Restaurants Inc. on the same day.
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