Mark Hulbert: By this measure, the bull market is just 15 months old

Any of a number of things can cause bull markets to come to an end, but old age is not one of them.

That’s important to remember because, even as the S&P 500 SPX, -0.07% and many other major market averages reach new all-time highs, there’s widespread concern about how old the current bull market is. The unspoken narrative is that at some point a bull market gets so old that it simply keels over dead.

Yet I could find precious little statistical support for this narrative. To be sure, the statistics involved are tricky, since it is undeniably — though trivially — true that all bull markets eventually come to an end.

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