The SPX and NDX rallied as much as 4% on today's session. Both indices closed more than 1.5% in the red. Tariffs continue to hemorrhage markets and impact companies like Apple (AAPL), which also faces pricing pressures abroad and from the White House. TSMC (TSM) shed its early rally off reports that it will have to pay a $1 billion fine. The big winners of the day: healthcare, seen in stocks like Humana (HUM), the leader of the SPX. Caroline Woods dives into the session fueled by volatility.