The boglehead philosophy involves slow accumulation of an index portfolio over time. Not many people had a huge windfall in 1989 and put it all in the Nikkei at

The boglehead philosophy involves slow accumulation of an index portfolio over time. Not many people had a huge windfall in 1989 and put it all in the Nikkei at once. The money you invested in 1980 is up 500% before dividends.