By Stephen Culp NEW YORK (Reuters) -U.S. stocks rose modestly on Monday, with few catalysts to spark much conviction before this week’s slew of megacap earnings, economic data and the Federal Reserve’s monetary policy meeting. The Nasdaq Composite Index and the S&P 500 advanced, with the latter poised to eke out yet another record closing high. BlackRock raised its overall U.S. stocks view to “overweight” from “neutral.” The Dow Jones Industrial Average was essentially unchanged. A spate of earnings from high profile tech and tech-adjacent momentum stocks waits in the wings, starting on Tuesda…