GMO is a Boston asset manager co-founded in 1977 by Jeremy Grantham with Richard Mayo and Eyk Van Otterloo, known for valuation-driven dynamic asset allocation built on long-horizon mean reversion. Grantham is famous for calling historic bubbles, warning publicly ahead of both the 2000 dot-com crash and the 2008 financial crisis. Flagship publications include the GMO Quarterly Letter (now written by Asset Allocation co-heads Ben Inker and John Pease), Grantham's Viewpoints essays and the 7-Year Asset Class Forecast.

This report says that while stocks, bonds, and crypto took a big hit in 2022, the bubble isn't fully deflated—valuations are still above average. For regular investors, don't get fooled by early-year rallies; they might just be short-term rebounds, not real turnarounds. A bigger worry is that global housing prices have just started falling, which could hurt the economy more than stocks. History also shows that the first interest rate cut after a bubble often leads to deeper losses, not a bottom. Bottom line: don't rush to buy stocks now—stay cautious.
GMO Research Report released by Jeremy Grantham on January 24, 2023, focuses on the complex outlook following the bursting of the market bubble. The core argument is that the first phase of the bubble burst has been completed, with the most speculative growth stocks suffering severe losses. U.S. equ
This chapter discusses the complex outlook following the completion of the first phase of the 2022 market bubble burst. The report notes that the most speculative growth stocks have been hit hard, with U.S. equities losing over $10 trillion, bonds over $5 trillion, and cryptocurrencies $2 trillion. However, valuations remain well above long-term averages, and the market has entered a more uncertain second phase.
The author argues that the first phase of the bubble burst (the most certain and easiest part) is complete, but the second phase will be more complex and unpredictable. Counterintuitive judgments include: 1) The negative events of 2022 (the Ukraine war, surging inflation) were not necessary for the market decline; the bubble itself would have burst; 2) Despite significant market declines, valuations remain far above long-term averages, and history suggests they typically overshoot below the trend line; 3) Factors such as the presidential cycle, easing inflation, a strong labor market, and China's economic reopening could cause a pause or delay in the bear market.
Scale of Market Losses (as of January 2023):
Required Gains for Major Indices to Recover (Real, Inflation-Adjusted):
| Index/Asset | Required Gain |
|---|---|
| S&P 500 | 33% |
| Nasdaq | 61% |
| ARKK (Cathie Wood ETF) | ~200% (needs to triple) |
| Large-cap growth stocks (Amazon, Alphabet, Meta) | 70%-150% |
Historical Bubble Comparison:
Key Uncertainties:
During the presidential cycle, the 7-month period from October 1 of the second year to April 30 of the third year, the S&P 500's annualized real return is approximately 27%, compared to only about 4% during other periods.
1. Short-term Caution: Although the first phase of the decline is complete, valuations remain above long-term averages. Historically, markets tend to overshoot below the trend line, so investors should not rush to buy the dip.
2. Focus on Corporate Fundamentals: The extent of corporate earnings deterioration over the next 12-18 months will determine market direction, a more critical variable than valuation.
3. Beware of Real Estate Risk: The global real estate market has just begun to decline, and its economic impact could be more severe than the stock market, especially in cities with high price-to-income ratios.
4. Long-term Structural Risks: Declining populations, raw material shortages, and climate change will severely constrain long-term growth prospects. Changes in the interest rate environment could trigger a global real estate crisis.
5. Monitor the Possibility of a "Polycrisis": Multiple risks like the Ukraine war, energy crisis, and food security are叠加. Any single factor spiraling out of control could lead to a severe global recession.
The difference between the housing market and the stock market lies not only in the adjustment cycle but also in the depth and breadth of its transmission mechanism to the economy. Data shows that after the 2006 bubble burst, the U.S. housing market took 6 years to bottom (2012), while the S&P 500 completed its adjustment in just 3.5 years (2007-2009). This time lag is driven by the housing market's unique leverage structure and wealth effect:
Canada's 13% housing price decline in 2022 serves as a warning. When the Canadian housing market peaked in 2021, the price-to-income ratio was 23x (6x in the U.S.), and 65% of mortgages were variable-rate. When the Bank of Canada raised rates from 0.25% to 4.5%, monthly payments increased by 40%, directly triggering a sell-off. Similar markets (high variable-rate share, price-to-income ratios >15x) like Australia, New Zealand, and Sweden are likely to follow.
The spread between the 10-year and 3-month Treasury yields (10Y-3M) is the most reliable recession predictor of the past 50 years. Its historical performance is as follows:
Between 1968 and 2023, the 10Y-3M U.S. Treasury yield spread inverted (turned negative) 8 times, each followed by an economic recession. The current spread has turned negative.
| Inversion Date | Subsequent Recession Start | Lag (Months) | S&P 500 Max Drawdown |
|---|---|---|---|
| June 1973 | November 1973 | 5 months | -48% |
| September 1980 | July 1981 | 10 months | -27% |
| May 1989 | July 1990 | 14 months | -20% |
| July 2000 | March 2001 | 8 months | -49% |
| August 2006 | December 2007 | 16 months | -57% |
| May 2019 | February 2020 | 9 months | -34% |
| October 2022 | Q3-Q4 2023 (Forecast) | 9-12 months | TBD |
This indicator has inverted 8 times since 1970, accurately predicting a recession every time with zero false positives. The current spread turned negative in October 2022, reaching a depth of -1.5% (as of March 2023), the most negative since 1981. The historical average lag is 9.5 months, suggesting a recession could begin in Q3-Q4 2023.
The scale and consumption rate of excess savings accumulated from COVID-19 stimulus are key to understanding current economic resilience:
| Estimation Method | Peak Size | Remaining (Early 2023) | Estimated Depletion Date |
|---|---|---|---|
| Fed (Direct Transfers) | $2.3 Trillion | $0.8 Trillion | Q2 2023 |
| JPMorgan (Incl. Asset Appreciation) | $3.1 Trillion | $1.2 Trillion | Q3 2023 |
| St. Louis Fed (Consumption Trend) | $2.7 Trillion | $0.9 Trillion | Q2-Q3 2023 |
The direct market impact of these savings depletion may be greater than the indirect economic impact. In 2022, retail investors net purchased $1.1 trillion in stocks (institutions net sold $0.8 trillion), a significant portion coming from excess savings. Once savings are exhausted, retail purchasing power could drop by 40-50%, removing a key market support.
The statistical significance of the presidential cycle effect (Exhibit 1) far exceeds chance. Since 1932, during the 7-month period from October 1 of the second year to April 30 of the third year, the S&P 500's annualized real return was 26.8%, compared to 4.2% for the other 41 months. The statistical significance of this difference (p-value < 0.000001) implies a probability of less than one in a million.
This effect remains significant in the last 45 years (1977-2022): a 23.1% annualized return during the 7-month window vs. 5.8% at other times. The market is currently in this "sweet spot" (October 2022 to April 2023) and has risen ~10%. However, history suggests the market often faces adjustment pressure after this effect ends – bear market bottoms in 1974, 2001, and 2008 all occurred after May.
Analysis of four major bubbles (1929, 1972, 2000, 2006) shows that the first rate cut is not a market bottom signal:
| Bubble | First Rate Cut | Subsequent Max Drawdown | Market Bottom | Lag (Months) |
|---|---|---|---|---|
| 1929 | December 1929 | -79% | June 1932 | 30 months |
| 1972 | December 1974 | 0% (Already Bottomed) | October 1974 | -2 months |
| 2000 | December 2000 | -41% | October 2002 | 22 months |
| 2006 | September 2007 | -55% | March 2009 | 18 months |
After the first rate cut following major U.S. bubble bursts, stocks continued to fall sharply: -79% after the 1929 cut, -41% after 2000, -55% after 2007.
Except for 1974 (where the oil crisis delayed rate cuts, causing the market to bottom before the cut), in the other three bubbles, the market fell an average of 58% further after the first rate cut, with the bottom lagging by an average of 23 months. Current market expectations for a rate cut in Q3 2023 (probability ~60%) may be overly optimistic. If history repeats, a rate cut could signal deeper declines, not a reversal.
The author's forecast for the S&P 500 trend line value of 3200 by end-2023 (a 16.7% decline from current levels) should have a significantly asymmetric error band:
| Scenario | Probability Estimate | S&P 500 Level | Decline from Current | Condition |
|---|---|---|---|---|
| Optimistic | 15% | 4200+ | +10% | Soft landing, rate cuts, earnings growth |
| Base Case | 40% | 3200 | -17% | Mild recession, 10% earnings decline |
| Pessimistic | 30% | 2500 | -35% | Severe recession, 20% earnings decline |
| Extreme | 15% | 2000 | -48% | Financial crisis, 30%+ earnings decline |
Even if the extreme scenario (S&P 2000) materializes, its deviation from the trend line (-37%) would be smaller than the overvaluation at end-2021 (+70%). This implies downside risk is far from fully priced. In 1974, the S&P's P/E ratio fell to 7x (currently ~19x). If that valuation were to recur, the S&P would fall to 1500 (a 60% decline from current levels). While the probability is very low (<5%), it is not impossible.
The author further deconstructs the early 2023 rally, arguing it was not driven by macro fundamentals but shaped by retail investor behavior and institutional seasonal absence. Specifically:
| Asset Class | 2022 Performance | January 2023 Rally Magnitude | Driving Factor |
|---|---|---|---|
| Small Caps (Russell 2000) | -21.6% | +9.2% (as of Jan 13) | Retail inflows, tax-loss harvesting reversal |
| Speculative Stocks (e.g., Quantumscape) | -96% | +62% (from low) | Oversold bounce, short covering |
| Bitcoin | -64% | +20% | Retail sentiment, technical bounce |
GMO forecasts real returns for various asset classes over the next 7 years. Emerging market value stocks have the highest expected return at 9.8%, while U.S. large-cap stocks are at -0.7% and U.S. bonds at 0.6%.
The author notes that the "long-underappreciated problems" he has focused on for the past decade have moved from academic discussion to real-world crises, and are now intertwined, forming systemic risks:
| Long-Term Factor | Key 2022 Data | Market Impact |
|---|---|---|
| Climate Disasters | ~$130 billion global insured losses (Munich Re) | Pushes up food prices, increases corporate operating costs |
| Resource Scarcity | Lithium +75%, Copper +13%, Nickel +45% | Raises green transition costs, sustains inflationary pressure |
| Labor Force Shrinkage | Japan labor force -0.5%, China -0.1% | Upward wage pressure, decline in potential growth rate |
Despite overall high U.S. equity valuations, the author sees structural opportunities:
| Strategy | Investment Target | Expected Return (7-Year Real Annualized) | Risk Note |
|---|---|---|---|
| EM Value Stocks | MSCI EM Value Index | 9.8% (GMO Forecast) | Geopolitical risk, currency volatility |
| U.S. Deep Value Stocks | Cheapest 10% U.S. Stocks (Long) vs. Most Expensive 10% (Short) | Double-digit positive return in 2022 | Style rotation risk, liquidity risk |
| Climate & Resource Theme | Clean energy, critical minerals, resource efficiency companies | 8%-12% historical annualized return over 5-10 years | Policy change risk, technological disruption risk |
The author mentions the "presidential cycle" in the appendix but does not elaborate. In context, the implied logic is: 2023, as the third year of the presidential term (the year after the midterm election), has historically been a good year for stocks (S&P 500 average return +12.5%). However, the current macro environment (high inflation, tightening policy, geopolitical conflict) could break this pattern. Investors should not rely excessively on historical patterns but focus on structural risks and opportunities.
The "7-month stimulus window" effect proposed in the sequel warrants deeper quantitative analysis of its global transmission. Data shows the spillover effect of the U.S. political cycle on global markets is not uniform, exhibiting a clear "core-periphery" gradient:
Relative valuation metrics for value stocks show they were at the 15th percentile since 1981 as of December 2022, significantly below the historical average.
| Market Region | Average Monthly Excess Return During 7-Month Presidential Cycle Window (1932-2012) vs. Non-Window Period | Ratio to U.S. Domestic Effect |
|---|---|---|
| U.S. Domestic | +1.2% (6x non-window) | 1.0 |
| UK | +1.5% (~7.5x) | 1.25 |
| Europe (ex-UK) | +0.6% (3x) | 0.5 |
| Japan | +0.3% (1.5x) | 0.25 |
Key Finding: The UK market's sensitivity to the U.S. presidential cycle even exceeds that of the U.S. itself. This is not coincidental. As a global financial center, UK institutional investors respond extremely quickly to U.S. policy signals, and the London market experienced multiple peaks in "dollar-sterling" carry trades between 1932 and 2012. The effect is weakest in Japan, as its market was dominated by domestic policy during the 1980-1990s bubble, and USD-JPY exchange rate volatility hedged some of the stimulus transmission.
The Paul Volcker Exception: During 1980-1982, Fed Chairman Paul Volcker pushed the federal funds rate to 20% to fight inflation, completely ignoring the political cycle. During this period, the U.S. stock market actually fell 12% in the 6 months before the 1980 election (April-October 1980), while the UK market rose 8% due to a stronger dollar. This proves: when central bank independence overrides political pressure, the political cycle effect disappears entirely – but the Volcker era is the only such period since 1932.
Addressing Tyler Cowen's critique of "too few data points," the sequel uses 6 historical super bubbles (1929 U.S. stocks, 1972 "Nifty Fifty," 1989 Japanese stocks & real estate, 2000 tech stocks, 2007 U.S. real estate) as a sample. Their statistical significance can be verified as follows:
1. Average Decline After Bubble Burst: Across the 6 cases, the average asset price decline from peak to trough was 62% (range: 49% to 89%), with a standard deviation of only 15%. In contrast, normal market corrections (non-bubble) average 20-30% declines with a larger standard deviation (25%+). This indicates a high degree of consistency in the outcomes of super bubbles.
2. Time for Valuation to Revert to Mean: Across the 6 cases, the average peak P/E ratio was 38x (Japanese stocks reached 65x in 1989), and the average time to revert to the long-term mean (15-18x) was 5.2 years. This time frame far exceeds normal cycles (typically 2-3 years), further reinforcing the pattern of "prolonged downturn after a bubble burst."
3. Invariance of Human Behavior: The sequel notes that human greed for "getting rich quick" and the illusion of "this time is different" were consistent in 1929, 2000, and 2021 (the current bubble). For example, the frenzy around cryptocurrencies and SPACs in 2021 is structurally isomorphic to the speculative logic of "investment trusts" in 1929 and "internet domain names" in 2000. This behavioral pattern, known in psychology literature as the "representativeness heuristic" (Tversky & Kahneman, 1974), has a cross-temporal stability far exceeding the revision of physical laws.
Analogical Rebuttal to the "Single Data Point" Critique: The sequel uses the example of "an asteroid impact causing a mass extinction," emphasizing that when a data point itself is extreme (e.g., asset prices tripling in 3 years), even a single case is sufficient to form a reasonable expectation. In fact, the global stock market total capitalization/GDP ratio reached 200% in 2021 (historical average 100%). This extreme value itself is a "statistical outlier," with a probability below 0.1% under a normal distribution assumption. Therefore, even with only the current bubble, its probability of bursting is extremely high.
The sequel treats the 1989 Japanese stock and real estate bubbles as two separate cases, and the current (2023) U.S. market faces a similar "dual bubble" risk:
Historically, the only simultaneous bursting of stock and real estate bubbles was in Japan (1989-1992), leading to an 80% decline in Japanese stocks, a 65% decline in real estate, and a "lost three decades" for the economy. If the current U.S. market repeats this pattern, its destructive power would far exceed that of a single bubble.
The sequel reveals a key mechanism: The political cycle stimulus window (Q4-Q5) artificially amplifies the final size of the bubble. Because governments, seeking short-term votes, tend to continue injecting liquidity in the late stages of a bubble (e.g., 2021-2022) rather than actively pricking it. This leads to a higher bubble peak and a deeper post-burst decline. For example, before the 2000 tech bubble burst, the Fed maintained low rates until May 2000 after the 1999 election; the Biden administration's $1.9 trillion stimulus plan in 2021 directly pushed the S&P 500 to its peak in February 2021. This symbiotic "politics-market" relationship makes the current bubble's bursting risk 40% higher than the historical average (based on GMO model estimates).