Dictionary of Business Terms: no-brainer
no-brainer
(slang) a decision-making situation where the correct choice is so obvious that it requires no thought.
Dictionary of Finance and Investment Terms: no-brainer
no-brainer
term used to describe a market the direction of which has become obvious, and therefore requires little or no analysis. This means that most of the stocks will go up in a strong bull market and fall in a bear market, so that it does not matter very much which stock investors buy or sell.

