Warren Buffett's historic $127 billion warning to Wall Street happens to align with another stock market alarm. Specifically, the S&P 500 currently trades at a historically expensive valuation. The index achieved a cyclically adjusted price-to-earnings ratio (CAPE) of 37.9 in December 2024, which is a substantial premium to 20-year average of 27.

Wall Street pointed slightly lower in early trading Friday but remains on track to close the week with solid gains with major corporations turning in largely healthy earnings reports. Futures for the S&P 500 ticked down 0.

Oracle shares jumped 8% after Trump touted a joint venture investing up to $500 billion for infrastructure tied to artificial intelligence. The new partnership, called Stargate, includes OpenAI, Oracle and SoftBank. Softbank Group Corp.’s Japan-listed shares surged 10.6% on Wednesday.