Over the past two years, investors have been taken on quite the roller-coaster ride.

In 2021, the benchmark S 500 (SNPINDEX: ^GSPC) endured no worse than a 5% correction, while all major indexes -- the Dow Jones Industrial Average (DJINDICES: ^DJI), S 500, Nasdaq Composite (NASDAQINDEX: ^IXIC), and Nasdaq 100 -- catapulted to record-closing highs. This was followed by a bear market in 2022, as well as a strong rebound for all four indexes over the past 10 months, which has been led by the Nasdaq 100 -- an index comprised of the 100 largest nonfinancial companies listed on the  exchange.

The expectation from investors is that these indexes should act as an accurate barometer of stock market health. But this isn't always the case.

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Source Fool.com