US STOCKS-Wall St rebounds after steep weekly decline; Fed in focus

* Fed meeting in view, investors seek stimulus clarity * Avago to buy LSI for $6.6 bln; AIG to sell unit for $5.4 bln * S&P 500 near all-time high, but below 14-day moving average * Indexes up: Dow 0.9 pct, S&P 0.7 pct, Nasdaq 0.8 pct By Angela Moon NEW YORK, Dec 16 (Reuters) - U.S. stocks rose on Monday, rebounding from their worst week in months as large deals boosted optimism but investors remained cautious ahead of an upcoming Federal Reserve policy meeting. Equitie