US stock investors are unflappable. Trade tensions, slowing growth and frothy valuations — none of it has stopped the torrid rally to record after record for the S&P 500 Index. Most Read from Bloomberg The US equities benchmark has gone 107 sessions without a drop of at least 2% — its longest stretch since July 2024. Even the early April tariff drama has been shrugged off with the gauge soaring 34% and adding nearly $16 trillion in market value since then, according to data compiled by Bloomberg. Risk ...