AI makes up 39% of the S&P. The last time something like this happened was with railroad stocks in 1859. Bank of America sounds the alarm—'The AI bubble rivals the peak of the 19th-century railroad bubble.' SpaceX plummeted 20%, wiping out $600 billion Google dropped 5% in a single day, Amazon down 4% How much faith in AI is left? #USStocks #AIBubble #S&P500 #SpaceX #TechStocks #Nasdaq #Investing #WallStreet #Hartnett #CryptoWatch