Here's why next week may be bad for stocks

Traders work on the floor of the New York Stock Exchange.
Lucas Jackson | Reuters

Besides the first day of summer, next week heralds a potentially negative week for stocks, if seasonal patterns hold.

The historic rhythm of a midyear selloff in the week after June's quadruple witching expiration Friday could make next week a downer.

Quadruple witching is the quarterly expiration of a variety of futures and options.

Despite that negative bias, one area of the market has done well.