Feeling uneasy with markets starting September on shaky ground? Don't be, history is on your side this election season. 

"Mid-term year three-month seasonality tends to flip to positive from negative in August-October -- this suggests becoming more bullish on the S&P 500 in August and buying a September dip ahead of 4Q, which is the best 3-month period of the Mid-term year," says Bank of America Merrill Lynch Stephen Suttmeier

The S&P 500 has been up 86% of the time with an average return of 6.37% during the fourth quarter of a mid-term election year, according to BofA data. 

If only emerging market investors got that memo.

Bullish data.
Bullish data.