Different than when the railroads dominated the market, or the industrials dominance in the 20s and 30s, or the nifty fifty, or the communication dominance in the late 90s?

Does the S&P 493 reveal a different economy or does it reveal that the author published an article based on feelings instead of research?

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Mistletoe 4 hours ago | parent [-]

All those ended pretty badly, right?

	▲	spwa4 28 minutes ago \| parent [-]
		Problem is, eventually everything ends badly. You can make this argument about "average S&P500 company", and the time in which it ends badly has gone down over time. In the last 10 years the average S&P500 company ends badly after about 18 years. If memory serves it was about 30 years in 2000, and much longer before that. By contrast most of these mania lasted a lot longer.