Donald Trump Keeps Taking Credit for the Economy. How Much Should He Get? -- FORTUNE

Since taking office, President Trump has routinely touted stock market gains and positive jobs reports as evidence that he is succeeding. Economists say that while he can take some credit for the stock market, it's far too soon for his policies to have affected the job market. That's because the stock market tends to react to expectations as much as reality, so it's reasonable to assume that traders responded to some of Trump's campaign promises, such as cutting taxes. ...
http://fortune.com/2017/07/20/donald-trump-economy-stock-market-jobs-reports-credit/