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Dollar Cost Averaging Failure
To investigate Dollar Cost Averaging Vanguard studied two lump sum investments of $1 million and $20 million and ran computer simulations rolling these simulations every ten years starting in February 1926 and completing in December 2011. This means that all the major corrections and stock market crashes including 1929, 1932, 1973-74, 1987, 1998, 1999, 2000-2003 and 2008 were included in their Dollar Cost Averaging study.
They then compared the results against an investor who placed capital into stocks at set periods through the same time frames using the Dollar Cost Averaging method. The computer simulations were ran and analyzed. The same Dollar Cost Averaging algorithms used were on the US stock markets and on the United Kingdom and Australian stock markets.
The evidence against Dollar Cost Averaging was overwhelming. Dollar cost averaging fails as an investment strategy when compared to lump sum investing. Vanguard went even further in their report indicating that their studies show that dollar cost averaging ends up hurting more investors than it helps.
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