Presidents don't control stock markets, market is not the economy, etc. Still, once upon a time, Trump used to brag that market gains were a good metric of his success.
Updated chart on how S&P 500 has fared under Trump vs Obama, through comparable periods in their presidencies:

Here's the same comparison chart for the Dow, under Obama vs Trump through May 31 of year 3 of their respective presidencies

yeesh and here's the Nasdaq