By Dan Weil One indicator says yes. Among top institutional investors, the stocks are under-owned compared to their S&P; 500 weightings. If you go by contrarian indicators, now might be a good time to buy mega-cap technology stocks. Among the top 100 actively-managed institutional-investor funds, Alphabet (GOOGL) – Get Alphabet Inc. Class A Report, Amazon (AMZN) – Get Amazon.com, Inc. Report, Apple (AAPL) – Get Apple Inc. Report, Meta Platforms (FB) – Get Meta Platforms Inc. Class A Report and Microsoft (MSFT) – Get Microsoft Corporation Report all are under-owned compared to their S&P 500 wei…