"Stock Market Hits New Highs: S&P 500 and Dow Soar in Record Rally"

The S&P 500 and Dow trade at record highs, driven by a few megacap companies, posing challenges for active fund managers due to restrictions imposed by the Investment Company Act of 1940, which limits the allocation to a single security to 5%. This makes it difficult for active managers to match the benchmark index, as they are required to maintain diversified holdings and mostly passive management. These regulations also prevent mutual funds from becoming activist investors, adding complexity to the already challenging landscape for stock pickers.