01What a high reading means
When the ratio climbs, the market value of nonfinancial corporate equity is expanding faster than the broad money supply that could in principle support it, a pattern historically associated with extended valuation regimes such as the late 1990s dot-com peak. When it falls, either equity valuations are compressing or M2 is growing faster than equity values, conditions that have often coincided with accumulation phases.
02Why M2 as the denominator
M2 is the Federal Reserve's broad money measure, covering cash, checking, savings and small time deposits. Scaling nonfinancial corporate equity by M2 asks whether the supply of dollars is keeping pace with the market's quoted worth, so a rising ratio means valuations are climbing faster than the money stock, not just faster than last quarter's prices.
03Limitations
NCBEILQ027S covers only domestic nonfinancial corporations, so it excludes financials, foreign listings and the full market capitalisation captured by a price index such as VTI. The figure is also a level, not a return: it ignores dividends and buybacks. M2 is a domestic measure while a large share of US corporate revenue is earned abroad. Treat the ratio as context for valuation regimes, not investment advice.
04Historical extremes
The ratio peaked near 3.5 in early 2000 at the height of the dot-com bubble and bottomed around 0.6 in 1982, when high interest rates crushed equity multiples while money supply kept growing. The 2000 high remains the all-time reading: more than two decades later the ratio, though substantially above its 1982 trough, has not reclaimed that peak. Each prior extreme eventually reverted toward the long-run median through a combination of equity drawdowns and money-supply growth.