Workers walk towards Halliburton Co. “sand castles” at an Anadarko Petroleum Corp. hydraulic fracturing (fracking) site north of Dacono, Colorado, U.S., on Tuesday, Aug. 12, 2014.

Jamie Schwaberow | Bloomberg | Getty Images

A number of Club stocks that were unloved on Wall Street earlier in the year have seen their fortunes rebound in recent months, including oilfield-services firm Halliburton (HAL) and industrial Caterpillar (CAT) — creating potential opportunities to lock in gains.