Looking at the historic chart of the DJI, it's gone up under every president. So, not to be bias here, Obama may have had an influence on the markets. Which policies those were, I'm unsure of to be honest.
However, you cannot dispute that the rally we've seen under Trump since November 9th (Hillary took a whole night off to wait and concede) has been the greatest and supersedes anything Obama could have had an influence on while in office.
The lowest point in the Obama administration was Mar 06, 2009 at 6,595.16. It took approximately 55 days until Apr 30, 2009 to regain, and maintain the average, of the 1463.69 points we saw under Trump's President-elect status, which I remind you, he has only held for 35 days.
Yes, we did see a rise in markets under Obama. A slow rise. However, it's indisputable thus far, that we haven't seen a rise under Trump, that probably will surpass Obama's over the next 4-8 years. This holds especially true when the DJI breaks the 20,000 under Trump; we will see a rally that will hold like no other (if history repeats and we see the same surge as we did at 1k, 2k, 5k, 10k, etc.).