Mark Hulbert reflects on the fourth anniversary of the American bull market. While some Wall Street investors worry about its age, history shows that bull markets do not die of old age. Out of the 38 bull markets identified by Ned Davis Research since 1900, 33 never lasted as long as the current one. The average length of these 38 bull markets is 25 months, with a median of 22 months, or about two years, making the current market particularly advanced compared to previous ones.
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