Add natural-gas stocks to the select group of sectors that lagged the September rally, Cramer said Monday, making them potential value plays in an otherwise expensive market.

Unfortunately, these stocks have been hammered just like the price of nat gas itself, which closed at $3.70 on Monday. Cramer called the group the “proverbial redheaded stepchild” of the stock family and said he’d been will to recommend only Chesapeake Energy if investors were compelled to own the group. But now Devon Energy , at $64, looks low enough in price to make it attractive, Cramer said.