Personally I don't know how much credit/blame any POTUS
Not much, the federal reserve chairman has way more power than the POTUS when guiding the economy and causing effect on the stock markets.
remember a few years ago when it was down every other thread on here said it was Obama's fault.
The liberals did the same with bush. Im sure the conservatives did the same with Clinton. If the current president was a republican you better believe that this board would be inundated with comments on how the "wonderful conservative president has made the stock market go up"
Most people don't have a f..ing clue about how the stock market works ( even the so called experts). So they will take any piece of data that fits their biases or ignore any piece of data that goes against their biases.