NEW YORK (AP) -- Standard & Poor's said Monday specialty pet retailer PetSmart Inc. will join the benchmark S&P 500 index after the close of trade Thursday, replacing Sunoco Inc. which is being acquired by Energy Transfer Partners LP.
Cabela's Inc., a specialty retailer of hunting and fishing gear, will move from the SmallCap 600 to the MidCap 400, replacing PetSmart.
And Acorda Therapeutics Inc., a biopharmaceutical company, will join the SmallCap 600 Index, Standard & Poor's said, replacing Cabela's.
In after-hours trading, shares of Phoenix-based PetSmart shares added 2.9 percent, or $1.69, to $69.25. The stock fell $1.42 during regular trading. Shares are up 31 percent year-to-date.
Cabela's, based in Sidney, Neb., rose 30 cents to close at $54.98, while shares of Ardsley, N.Y.-based Acorda fell 6 cents to close at $25.55.