Crash Warnings Are Piling Up on Wall Street. Jack Bogle Had a 6-Word Rule for Exactly This.

Four crash warnings in one weekend, a 4.4% drop and the worst week since April. Jack Bogle's rule for moments like this was six words long, and his second rule, your age in bonds with Social Security counted, tells a 70-year-old widow with $1.5 million exactly how much stock to hold, what each mix loses in a 2007-size fall, and how to make the move without a tax bill.