With the Nasdaq Composite in correction territory, investors should consider investing some cash in the stock market. Corrections are defined as a decline of 10% from an all-time high, but they occur fairly often (just over every year since 1980).

The Nasdaq Composite (NASDAQINDEX: ^IXIC) has fallen more than 10% from a recent high. A bear market -- a 20% drop from recent highs -- is not guaranteed to happen, but this is why investors get so worried about a 10% market decline.