Prison operator GEO Group GEO.N fell about 10% after suspending quarterly dividend payments. By Shivani Kumaresan and Medha Singh April 7 (Reuters) - Wall Street's main indexes were set to dip at open on Wednesday as investors cautiously awaited minutes from the Federal Reserve's last meeting that could offer clues on the central bank's views on inflation and an economic recovery. A strong monthly payrolls report, which helped the S&P 500 hit its fourth consecutive record high on Tuesday, is only a small step towards the central bank's threshold for considering tapering its massive support for the economy.