DEFINITION of 'Capping'
2. An attempt to keep a stock's price low or move its price lower by putting selling pressure on it.
BREAKING DOWN 'Capping'
1. The investor who might practice capping is a call option writer. If practicing capping, he or she is trying to avoid having to transfer the underlying security or commodity to the option holder. The goal is to have the option expire worthless so that the premium initially received by the writer is protected.
2. This is a violation of NASD rules.