Earnings Yield Gap

What Is the Earnings Yield Gap?

The earnings yield gap (EYG) is computed as the equity earnings yield (typically forward 12-month EPS divided by the current index price) minus the 10-year nominal government bond yield. A positive gap indicates equities offer a higher prospective yield than bonds, implying relative value in stocks; a negative gap implies bonds provide superior compensation per unit of expected return, raising the question of why investors should accept lower yields for taking on equity volatility.

This framework is inseparable from the Fed Model, a concept popularized by strategist Ed Yardeni in the late 1990s, drawing on language from a Federal Reserve Humphrey-Hawkins report. Yardeni observed that the S&P 500 earnings yield and the 10-year Treasury yield had tracked each other remarkably closely through the 1980s and 1990s, suggesting mean-reversion dynamics between the two. The EYG operationalizes this into a continuously monitored spread, allowing traders to quantify how far apart the two yields have drifted and in which direction pressure should build.

Critically, because the EYG relies on forward earnings estimates rather than trailing figures, the signal is inherently forward-looking but also contingent on analyst forecast accuracy. When the earnings revision cycle turns negative, as it did in late 2022 and again in early 2023, the apparent cheapness signaled by a wide EYG can be an artifact of estimates that have not yet been cut, a form of valuation mirage that has burned many systematic buyers.

Why It Matters for Traders

The EYG is one of the most widely referenced cross-asset valuation signals among institutional equity strategists, multi-asset macro funds, and sovereign wealth allocators. It directly quantifies the equity risk premium on an earnings-based methodology, distinct from dividend yield approaches, and anchors equity allocation decisions within the broader monetary policy and yield curve environment.

When the EYG is wide, equities offer materially more yield than bonds, providing the foundational logic for the TINA (There Is No Alternative) trade that dominated the post-2009 bull market. When the gap collapses or inverts, TINA reverses into what some strategists call TARA (There Are Reasonable Alternatives), prompting systematic great rotation flows from equities into investment-grade credit, Treasuries, or money market instruments. Multi-asset funds explicitly model EYG dynamics around central bank pivots: the gap tends to compress aggressively in the early phase of rate-hiking cycles before equities reprice downward to restore the spread.

The EYG also informs sector rotation decisions. Rate-sensitive sectors with bond-proxy characteristics (utilities, real estate investment trusts, consumer staples) tend to underperform most severely when the EYG narrows, as capital shifts toward government paper that now offers competitive yields with lower earnings uncertainty.

How to Read and Interpret It

For the S&P 500 versus the US 10-year Treasury, practitioners use the following approximate thresholds:

• EYG above +200bp: Historically supportive of above-average forward equity returns over 12 to 24 months; equities offer compelling relative value and risk-on positioning is fundamentally justified.
• EYG between 0 and +200bp: Neutral zone; directional equity allocation is driven more by earnings momentum, financial conditions indexes, and credit spreads than by valuation alone.
• EYG below 0 (inverted gap): Rare historically before 2022; bonds offer better nominal risk-adjusted returns per unit of yield. Sustained negative EYGs historically correlate with P/E multiple compression as the discount rate advantage of equities evaporates.

Comparison across markets requires care. European equities (STOXX 600) have historically carried a structurally wider EYG than the S&P 500, partly reflecting a higher embedded risk premium for political and currency fragmentation risk. Japanese EYGs have been distorted for decades by the Bank of Japan's yield curve control suppressing the JGB yield anchor. Always contextualize the current EYG reading against its own 10 to 15 year history for each market rather than applying US thresholds universally.

Historical Context

From 2009 through 2021, the US EYG averaged roughly +350 to +400 basis points, the product of ultra-low Treasury yields held down by successive rounds of quantitative easing combined with resilient corporate earnings growth. This extraordinary spread provided the fundamental backbone for equity overweights even as P/E multiples expanded well above historical norms: the model said equities were cheap relative to bonds, and for over a decade, that call was correct.

The regime broke decisively in 2022. As the Federal Reserve raised the federal funds rate from near-zero to above 5% in the most aggressive hiking cycle in four decades, the 10-year Treasury yield surged from approximately 1.5% in early 2022 to above 4.2% by October 2022. The S&P 500 forward earnings yield, meanwhile, had also moved higher as prices fell roughly 25% peak to trough, but the bond yield move was larger and faster. By early 2023, the EYG had compressed to approximately +50 to +100 basis points, the tightest reading since the early 2000s dot-com era when equities were deeply overvalued. By late 2023, with the 10-year approaching 5% and forward earnings estimates still holding near their peaks, several major strategists calculated that the EYG had briefly turned negative for the S&P 500, an event without precedent since the late 1990s bubble period and a development that fundamentally challenged the structural bull case for US equities versus bonds.

Limitations and Caveats

The EYG's most significant structural weakness is its dependence on forward earnings estimates, which are persistently and measurably optimistic. Sell-side analysts systematically overestimate forward EPS in the early and middle stages of economic slowdowns, meaning the earnings yield component is often overstated precisely when the signal would counsel buying equities. This bias inflates the apparent EYG and can generate false buy signals ahead of earnings-driven drawdowns.

A deeper theoretical critique is that the model conflates nominal bond yields (which embed inflation expectations) with earnings yields (which represent real economic flows). In periods of high inflation, nominal bond yields rise but real earnings may not keep pace, making the comparison misleading. Conversely, in deflationary environments, low bond yields may reflect growth fears that should also depress earnings expectations, producing an EYG that appears wide but is entirely illusory.

Academic research, including work by Asness (2003) and others, finds limited evidence that the EYG has stable predictive power across different inflation regimes, particularly outside the low-inflation decades of the 1980s and 1990s that made the original Fed Model observation appear robust.

What to Watch

For a theoretically cleaner signal, monitor the spread between the S&P 500 forward earnings yield and the 10-year TIPS yield rather than the nominal Treasury yield. This real earnings yield gap removes the inflation distortion and aligns both sides of the comparison on a real economic basis. In mid-2023, the real earnings yield gap was also the tightest in decades, corroborating the nominal EYG warning rather than contradicting it.

Track EYG divergences across geographies: when the US EYG narrows sharply while European or emerging market EYGs remain wide, global macro funds rotate into non-US equities, creating tactical momentum that can persist for multiple quarters. Also monitor the pace of earnings revisions as a health check on the EYG signal: a wide EYG accompanied by accelerating downward revisions is a trap, while a wide EYG supported by stable or rising estimates is a structurally sound foundation for equity overweights.