US STOCKS-Indexes set to open little changed; commodities hit
* Allergan, Pfizer drop after biggest ever healthcare deal
* Mallinckrodt up after posting higher sales
* Commodity prices under pressure, but oil recovering
* Futures: Dow down 1 pts, S&P down 0.5 pts, Nasdaq up 1.25 pts (Adds details, comment, updates prices)
By Abhiram Nandakumar
Nov 23 (Reuters) - U.S. stock indexes were set to open little changed on Monday, coming off last week's strong gains, as investors head into Thanksgiving week.
Globally, stocks were hit as commodities prices tumbled on worries about oversupply and tepid demand, with copper and metal prices languishing at multi-year lows.
Crude oil prices pared back some losses after Saudi Arabia agreed to cooperate with other producers to stabilize prices.
The dollar hit a seven-month high on Monday on expectations that the Federal Reserve will raise interest rates next month. Continuación...