Big Tech drags down S&P 500 amid jitters over highly valued stock market

Core Viewpoint - U.S. stocks are facing challenges this month due to concerns over high valuations, particularly with the S&P 500's heavy reliance on Big Tech, which increases its susceptibility to market pullbacks [1] Group 1 - The S&P 500 index is experiencing volatility, primarily attributed to worries about overvalued stocks [1] - The concentration of the S&P 500 in Big Tech companies is a significant factor contributing to its vulnerability [1] - A notable pullback was observed on Thursday, highlighting the risks associated with the current market dynamics [1]