Here's a list of all the presidents in the past 100 years who have or haven't presided over a new record-high stock market

Have: (14)
Wilson
Harding
Coolidge
Hoover
Eisenhower
Kennedy
Johnson
Nixon
Reagan
Bush Sr.
Clinton
Bush Jr.
Obama
Trump

Haven't: (3)
Roosevelt
Truman
Carter

To be fair, Roosevelt was president for 14 years. But on the other hand he came to power during the Great Depression. Arguably the market didn't fully recover until after Truman was finished as well.

But let's assume those are lame ass liberal cuck arguments, and it's their fault cause they sucked. Still, 13/16 presidents before Trump were good enough to preside over a record stock market.

A simple sign test would tell you it would be surprising if Trump didn't preside over a record stock-market, independent of his qualities as a president.

So maybe that's not the best argument in his favour.