DB: Sell in the summer, the next 5% move is more likely to be downwards

Wondering what to trade in the summer? The largest German financial institution - Deutsche Bank has an idea. And it is - sell in the summer, because according to analysts of the bank, the next 5% movement for the US indices will be down.
The rise of the indices is so far justified, but from the bank believe it has reached its limits in the short term and the market may be tense in connection with potential dramatic decisions by Congress.
State legislators will most likely present significant changes to tax legislation that will lead to simplification of the system. Still, it is not clear when such changes will come into force. It is very likely that they will not materialize after August.
Deutsche Bank also said it was reducing its stock expectations. In line with their expectations for the direction of the S&P 500, from the bank practically reduce their tactical exposure to US stocks from 70 to 60%.