A chart making the rounds divides the S&P 500 by the size of the Federal Reserve’s balance sheet.
The idea sounds powerful. The stock market sits on top. The Fed’s asset holdings sit on the bottom. When the ratio rises, stocks are gaining faster than the Fed is expanding its balance sheet. When the ratio falls, stocks are weakening, the Fed is adding assets, or both.
The chart appears to tell a clean story.
It surged near the dot-com peak. It collapsed during the 2008 financial crisis. It dropped again when the Fed expanded its balance sheet during the pandemic. Now it has climbed back toward the middle of its historical range.
That raises an obvious question: Has the stock market finally grown into the Fed’s money creation, or is this ratio giving investors a false sense of balance?
The honest answer is less exciting than the chart. The ratio is useful for showing changes in the monetary regime. It is much weaker as a measure of fair value or a signal of what stocks will do next.
That does not make it useless. It makes it a chart that needs context.
What is the S&P-to-Fed ratio?
The calculation is simple:
S&P 500 index level ÷ Federal Reserve total assets
In July 2026, the Federal Reserve reported total assets of about $6.74 trillion. The S&P 500 had recently traded in the mid-7,000s. When Fed assets are entered in millions of dollars, the ratio lands near 0.0011.
The ratio rises when:
- the S&P 500 climbs;
- the Fed’s balance sheet shrinks;
- the S&P rises faster than the balance sheet;
- or some mix of those changes occurs.
The ratio falls when:
- stocks decline;
- the Fed adds assets;
- the balance sheet grows faster than stocks;
- or both sides move against the ratio at once.
The video that inspired this article describes high readings as “stretched,” low readings as “flooded with Fed money,” and the current middle reading as a balanced point between the two. That is a reasonable first interpretation, but it goes farther than the math can support on its own.
Is this a recognized economic indicator?
It is a real ratio built from real public data. It is not a standard valuation measure used across economics and professional asset management.
Common stock-market valuation measures compare prices with something tied directly to business value or economic output:
- earnings;
- sales;
- book value;
- corporate profits;
- dividends;
- GDP;
- total market capitalization.
The S&P-to-Fed ratio compares a price index with the assets held by the central bank.
Those two series are related through monetary policy, interest rates, risk appetite, and financial conditions. Federal Reserve research has found that Fed policy can affect stocks through changes in yields, equity risk premiums, expected dividends, and policy communication.
But that does not mean a specific division of the S&P index by Fed assets produces a dependable fair-value measure.
A useful way to describe it is:
The ratio is an informal macro indicator, not an established valuation model.
It can help show how stock prices have moved relative to the scale of Federal Reserve intervention. It cannot tell us by itself that stocks are cheap, expensive, safe, or ready to reverse.
The first major flaw: the denominator changes during crises
The ratio often becomes extremely low because two things happen at the same time.
Stocks fall.
Then the Fed expands its balance sheet to fight the crisis.
That is what happened in 2008. The financial system weakened, the S&P 500 collapsed, and the Federal Reserve added large amounts of assets through emergency programs and bond purchases.
The numerator fell while the denominator rose.
The ratio plunged from both directions.
A low reading near a market bottom may look like a successful signal. But the ratio may simply be recording a crisis that is already underway and a policy response that has already started.
This creates a cause-and-effect problem.
Did a low ratio predict the recovery?
Or did a crash and an emergency Fed response mechanically create the low ratio?
Those are not the same claim.
The second flaw: the S&P 500 level is not the value of the stock market
The S&P 500 is an index number.
It is not the combined dollar value of all its companies. It is not total household wealth. It is not corporate profits. It is not GDP.
The index is weighted by company market value, but the published index level is the output of an index formula. Companies enter and leave. Share prices change. Share counts change. A small group of very large companies can drive much of the movement.
This matters because the numerator and denominator do not share natural economic units.
The S&P is an index level. Fed assets are measured in dollars.
The ratio’s numerical level depends on the unit used for the balance sheet. Fed assets measured in millions produce a number near 0.0011. Measured in billions, the displayed number would be about 1.1. The chart’s shape would stay the same, but the supposed importance of “0.0011” would disappear.
That means the level has no natural economic meaning.
The trend may be informative. Calling one specific number “fair value” is much harder to defend.
The third flaw: the Federal Reserve changed after 2008
A long-term average can hide a structural break.
Before the financial crisis, the Federal Reserve operated with a much smaller balance sheet and a system of relatively scarce bank reserves.
After 2008, the Fed moved toward a system with abundant reserves. It held trillions of dollars in Treasury securities and mortgage-backed securities. Large-scale asset holdings became a lasting part of the operating framework.
This makes the pre-2008 and post-2008 periods difficult to compare.
A ratio that looked high in 1999 may partly reflect a small pre-crisis Fed balance sheet. A lower ratio after 2008 may reflect a permanent change in how the central bank runs monetary policy, not simply a cheaper stock market.
A historical average built across these different systems may look precise while mixing periods that do not belong in one simple category.
A larger Fed balance sheet is not always “money printing”
The video uses the phrase “money printer,” which is common in market commentary. It can also mislead.
When the Fed buys securities, it creates reserve balances for banks. That can affect interest rates, liquidity, and asset prices.
But not every increase in Fed assets has the same purpose.
In late 2025, the Federal Reserve ended balance-sheet runoff. In 2026, it bought short-term Treasury bills to maintain an ample level of reserves and continued moving its portfolio away from mortgage-backed securities. By July 1, 2026, the Fed reported total assets of about $6.73 trillion, up roughly $151 billion from early January.
The Fed described these purchases as reserve management, not a new emergency program aimed at pushing long-term rates or stocks higher.
That distinction matters.
Emergency QE often involves large purchases of longer-term securities designed to lower borrowing costs and stabilize markets.
Reserve-management purchases can be smaller and focused on keeping the banking system supplied with enough reserves for short-term rates to remain under control.
The balance sheet rises in both cases. The market meaning can be different.
What the ratio gets right
The ratio still tells us something useful.
It shows the scale of crisis intervention
The deep drops around 2008 and 2020 capture a real pattern:
- stocks weakened;
- the Fed responded;
- central-bank assets became much larger relative to the stock index.
That makes the ratio a visual record of emergency monetary regimes.
It shows when stocks outrun Fed asset growth
A rising ratio means stock prices are increasing faster than the Fed’s balance sheet.
That can happen because:
- earnings improve;
- valuations rise;
- investors accept less compensation for risk;
- the economy grows;
- the Fed shrinks its holdings;
- fiscal spending supports demand;
- one sector becomes dominant;
- or several of these forces work together.
The ratio cannot identify the cause, but it shows the relative movement.
It shows that the post-pandemic market did not need endless balance-sheet expansion
After the Fed’s pandemic purchases slowed and QT began, the stock market eventually recovered and reached new highs.
That matters. It shows that stocks can rise while the Fed’s balance sheet is flat or shrinking.
What does today’s middle reading tell us?
The strongest conclusion is modest:
The stock market has recovered relative to the size of the Fed’s balance sheet.
That is true.
It does not prove that the market is normally valued.
A ratio near its historical middle could exist while:
- price-to-earnings ratios are high;
- market leadership is concentrated;
- profit margins are elevated;
- investors are excited about AI;
- fiscal deficits support economic demand;
- credit remains easy;
- or long-term rates create pressure beneath the surface.
The ratio compares stocks with the Fed. It does not compare stocks with profits.
That is why it can look normal while other valuation measures look expensive.
Two competing interpretations
The constructive case
The market climbed while the Fed stopped expanding its balance sheet and later reduced it.
That suggests the rally was not based solely on fresh QE.
Economic growth remained positive. Companies produced real revenue and earnings. Investors placed a high value on AI infrastructure and future productivity. The Fed eventually stopped QT, reducing a source of pressure on bank reserves.
Under this view, the rising ratio reflects a market that has grown beyond its crisis-era dependence on central-bank asset purchases.
The cautious case
The denominator remains far larger than it was before 2008.
Fiscal deficits have added another form of support to the economy. A small group of large technology companies has driven a large share of index gains. Standard valuation measures remain elevated. Fed asset purchases for reserve management may still add liquidity even if they are not called QE.
Under this view, the ratio’s return to the middle says little about fair value. It may simply show that stock prices rose enough to catch up with a permanently larger central-bank balance sheet.
What historical periods should we compare?
The dot-com peak
The ratio reached a high level because the S&P surged while the Fed’s balance sheet remained small.
That period matches the idea of stock prices outrunning monetary support. It also featured extreme technology valuations and speculative demand.
The 2008 financial crisis
The ratio collapsed as stocks fell and Fed assets rose.
That low reading lined up with a future buying opportunity, but it was created by the crisis itself. It worked better as a regime marker than a leading signal.
The 2010s expansion
Stocks climbed for years while the Fed’s balance sheet eventually flattened.
The rising ratio reflected economic recovery, earnings growth, lower risk premiums, and a market learning to function without continuous new QE.
The pandemic
The Fed’s balance sheet expanded at historic speed while stocks first crashed and then rebounded.
The ratio fell sharply because the denominator changed faster than the numerator.
The 2022–2026 period
The Fed raised rates and reduced its balance sheet. Stocks fell in 2022, then recovered and moved higher.
The ratio rose because stock prices increased while Fed assets remained well below their pandemic peak.
That can be read as resilience. It can also be read as renewed valuation risk.
The ratio does not decide between those stories.
What could move the ratio next?
The ratio could rise if:
- stocks continue climbing;
- the Fed holds assets steady;
- the Fed resumes runoff;
- earnings support higher prices;
- investors keep paying more for large technology companies.
It could fall if:
- stocks correct;
- a recession hurts earnings;
- the Fed responds to a crisis with large asset purchases;
- reserve-management purchases grow;
- a credit event forces emergency support.
A falling ratio would not automatically be bullish. It could mean the market has entered a crisis.
A rising ratio would not automatically be healthy. It could mean stocks are becoming expensive relative to a stable balance sheet.
The direction needs a cause.
What to watch with the ratio
Use the ratio beside other indicators, not by itself.
Pair it with:
- S&P 500 earnings;
- forward and cyclically adjusted P/E ratios;
- market concentration;
- corporate credit spreads;
- bank lending standards;
- unemployment;
- inflation;
- real Treasury yields;
- the Fed’s securities holdings;
- bank reserves;
- fiscal deficits;
- Treasury issuance.
The ratio becomes more useful when those measures tell a consistent story.
For example, a rising ratio paired with stronger earnings and stable credit may support the constructive view.
A rising ratio paired with weaker earnings, extreme concentration, and widening credit spreads would carry a different message.
The real lesson from the chart
The S&P-to-Fed ratio does not reveal the fair price of the stock market.
It does show how stock prices have moved relative to the size of the central bank’s asset holdings.
Its lows tend to appear during crises because stocks fall while the Fed expands its balance sheet. Its highs appear when stocks outrun Fed assets. Its middle says the two series have returned to a familiar relationship.
That is useful context.
But “back to normal” is not the same as cheap, safe, or ready to rise.
The chart is best used to identify the monetary regime:
- emergency support;
- post-crisis recovery;
- tightening;
- or a market moving independently of new Fed purchases.
The next macro phase will not be decided by one ratio. It will depend on earnings, inflation, credit, fiscal policy, interest rates, and how the Fed responds when one of those forces breaks.
That is the reason to keep the chart.
Not because it predicts the future, but because it forces us to ask what is driving the market now.