Traders work on the floor of the New York Stock ExchangeBy means of Chuck Mikolajczak NEW YORK (Reuters) – With just over a month closing in a 12 months that has seen the S&P 500 rocket to new data, some of the rally's drivers can have peaked: inventory buybacks. In the last few years, major U.S. companies, together with IBM, Apple and Exxon Mobil have dramatically boosted share repurchases. General, Federal Reserve information presentations firms are the principle buyer of equities – while pension money, mutual dollars and households have increasingly more been retailers in recent years. However Fed figures show buybacks seem to have peaked remaining 12 months.