US markets re-open today after the Labor Day holiday, and stock futures are higher right now.
There's the old Wall Street adage "Sell in May and go away" because the summer can be slow in financial markets. But the summer was doing well this year. Stocks are up 7% for the summer, and up almost 12% for the S&P 500 for the year.
But there are three big September events that could shake up the markets:
* ECB meeting Thursday, which will be very important for what happens with Europe's debt crisis
* August US jobs report on Friday. We're expecting 130,000 jobs created and no change in jobless rate.
* Fed interest rates meeting Sept. 12-13th.
Christine Romans looks at how these three events have the potential to affect stock markets in September.