The S&P 500 is up 8.6% since the market close on January 20, the final day of the Trump presidency. That means President Joe Biden is on track for the strongest stock market performance during a new president’s first 100 days since John F. Kennedy in 1961, according to CFRA Research. The Biden rally squeaks past the 8.4% jump during the first 100 days of the Obama presidency and is well above the 5% increase in the months following former