The health of the stock market is not an indicator of inflation in any way. In fact, corporate profit gouging would exacerbate inflation, while creating higher profits that would increase the stock price.

The president doesn’t have to be an economic genius, he can hire people for that, but they should at least understand the basics of how the economy works. Of course, if you have operated on the wrong side of the law for your entire life, you have no actual experience in real world business.