Dec 9 (Reuters) - U.S. investors poured large sums into money market funds while pulling back ​from riskier equity funds in the week ‌to December 3, taking a cautious stance ahead of the Federal ‌Reserve's policy decision on Wednesday. They accumulated approximately $104.75 billion worth of U.S. money market funds, registering their largest weekly net purchase since November 5, LSEG Lipper data ⁠showed. Despite expectations of ‌a rate cut, investors remained wary, with stretched valuations in mega-cap te ...