Dollar-Cost Averaging Investors During a Recession
A follower of the long-term, buy-and-hold strategy knows that short-term problems will barely be a blip on the chart when taking a 20-30 year horizon. This investor merely continues dollar-cost averaging in a bad market the same way as he or she would in a good one.
Source: http://www.investopedia.com/articles/02/100402.asp