Market timing

Market timing is the strategy of making buy or sell decisions of financial assets (often stocks) by attempting to predict future market price movements. The prediction may be based on an outlook of market or economic conditions resulting from technical or fundamental analysis. This is an investment strategy based on the outlook for an aggregate market, rather than for a particular financial asset.
See more at Wikipedia.org...

Asset allocation in which the investment in the equity market is increased if one forecasts that the equity market will outperform T-bills and decrease when market is anticipated to underpreform.

Attempting to leave the market entirely during downturns and reinvesting when it heads back up. Requires a crystal ball to be effective.