In finance, a contrarian is one who attempts to profit by investing in a manner that differs from the conventional wisdom, when the consensus opinion appears to be wrong.
A contrarian believes that certain crowd behavior among investors can lead to exploitable mispricings in securities markets. For example, widespread pessimism about a stock can drive a price so low that it overstates the company's risks, and understates its prospects for returning to profitability. Identifying and purchasing such distressed stocks, and selling them after the company recovers, can lead to above-average gains. Conversely, widespread optimism can result in unjustifiably high valuations that will eventually lead to drops, when those high expectations don't pan out. Avoiding (or short-selling) investments in over-hyped investments reduces the risk of such drops. These general principles can apply whether the investment in question is an individual stock, an industry sector, or an entire market or any other asset