BRIEF-S&P 500 to add Tractor Supply; index to drop Life Technologies, which is being acquired

Thu Jan 16, 2014 5:20pm EST

Jan 16 (Reuters) - * S&P says Tractor Supply Co to replace Life Technologies Corp

in S&P 500 * S&P says change to be made after close of trading on January 23 * S&P says Life Technologies is being acquired by Thermo Fisher Scientific Inc

* S&P says Tractor Supply has a market capitalization that is more

representative of the large cap market space