Viewpoints | August 31, 2022

Entering the Superbubble’s Final Act

Executive Summary

Only a few market events in an investor’s career really matter, and among the most important of all are superbubbles. 1 These superbubbles are events unlike any others: while there are only a few in history for investors to study, they have clear features in common.

One of those features is the bear market rally after the initial derating stage of the decline but before the economy has clearly begun to deteriorate, as it always has when superbubbles burst. This in all three previous cases recovered over half the market’s initial losses, luring unwary investors back just in time for the market to turn down again, only more viciously, and the economy to weaken. This summer’s rally has so far perfectly fit the pattern.

The U.S. stock market remains very expensive and an increase in inflation like the one this year has always hurt multiples, although more slowly than normal this time. But now the fundamentals have also started to deteriorate enormously and surprisingly: between COVID in China, war in Europe, food and energy crises, record fiscal tightening, and more, the outlook is far grimmer than could have been foreseen in January. Longer term, a broad and permanent food and resource shortage is threatening, all made worse by accelerating climate damage.

The current superbubble features an unprecedentedly dangerous mix of cross-asset overvaluation (with bonds, housing, and stocks all critically overpriced and now rapidly losing momentum), commodity shock, and Fed hawkishness. Each cycle is different and unique – but every historical parallel suggests that the worst is yet to come.

The Times that Really Matter for Investors

Most of the time (85% or thereabouts) markets behave quite normally. In these periods, investors (managers, clients, and individuals) are happy enough, but alas these periods do not truly matter. It is only the other 15% of the time that matters, when investors get carried away and become irrational. Mostly (about 12% of the time 2 ), this irrationality is excessive optimism, when you see meme stock squeezes and IPO frenzies, such as in the last 2 years; and just now and then (about 3% of the time), investors panic and sell regardless of value, as they did at 666 on the S&P in 2009 and with many stocks trading at a 2.5 P/E in 1974. These times of euphoria and panic are the most important for portfolios and the most dangerous for careers. (Keynes’ famous Chapter 12 would suggest that when confronted with a bubble, running off the cliff with company is the safest strategy for managers, whose business imperative, after all, is to be a permabull, where the real money can be made. This is a strategy adopted reasonably enough by almost everyone. 3 )

This 15% is very different from ordinary bull and bear markets. Averaging ordinary bull and bear markets with this handful of outliers dilutes the data and produces misleading signals. My strong suggestion is to treat the superbubbles – 2.5 to 3 sigma events – as special, collectively unique occasions. It is as if there is a phase change in investor behavior. After a long economic upswing and a long bull market, when the financial and economic systems look nearly perfect, especially with low inflation and high profit margins, as does the friendliness of the authorities, especially toward cheap leverage, there gets to be a flashpoint, like that summer evening when every last flying ant takes off simultaneously. This effect luckily creates measurable events in the market. So you can see the explosion of confidence and speculation and crazy wishful thinking regardless of value however you wish to define it. And outcomes from this unique group of superbubbles (just three in modern times in the U.S. before this current one) are indeed special: the much discussed (by us) divergence between conservative and speculative stocks; the rapid bear market rallies discussed later here; the rapid onset of recession (3 out of 3 incidents to date, with 1 mild – 2000 – and the other 2 – 1929 and 1972 – severe); and finally, the much increased probabilities of further unexpected financial and economic accidents.

We’ve been in such a period, a true superbubble, for a little while now. And the first thing to remember here is that these superbubbles, as well as ordinary 2 sigma bubbles, have always – in developed equity markets – broken back to trend. The higher they go, therefore, the further they have to fall.

The Stages of a Superbubble

My theory is that the breaking of these superbubbles takes multiple stages. First, the bubble forms; second, a setback occurs, as it just did in the first half of this year, when some wrinkle in the economic or political environment causes investors to realize that perfection will, after all, not last forever, and valuations take a half-step back. Then there is what we have just seen – the bear market rally. Fourth and finally, fundamentals deteriorate and the market declines to a low.

Let’s return to where we are in this process today. Bear market rallies in superbubbles are easier and faster than any other rallies. Investors surmise, this stock sold for $100 6 months ago, so now at $50, or $60, or $70, it must be cheap. Outside of the late stage of a superbubble, new highs are slow and nervous as investors realize that no one has ever bought this stock at this price before: so it is four steps forward, three steps back, gingerly exploring terra incognita. Bear market rallies are the opposite: it sold at $100 before, maybe it could sell at $100 again.

The proof of the pudding is the speed and scale of these bear market rallies.

  1. From the November low in 1929 to the April 1930 high, the market rallied 46% – a 55% recovery of the loss from the peak.
  2. In 1973, the summer rally after the initial decline recovered 59% of the S&P 500's total loss from the high.
  3. In 2000, the NASDAQ (which had been the main event of the tech bubble) recovered 60% of its initial losses in just 2 months.
  4. In 2022, at the intraday peak on August 16th, the S&P had made back 58% of its losses since its June low. Thus we could say the current event, so far, is looking eerily similar to these other historic superbubbles.

Fundamentals Threaten to Fall Apart

Economic data inevitably lags major turning points in the economy. To make matters worse, at the turn of events like 2000 and 2007, data series like corporate profits and employment can subsequently be massively revised downwards. It is during this lag that the bear market rally typically occurs.

Why are the historic superbubbles always followed by major economic setbacks? Perhaps because they occurred after a very extended build-up of market and economic forces – with a major surge of optimism thrown in at the end. At the peak, the economy always looks near perfect: full employment, strong GDP, no inflation, record margins. This was the case in 1929, 1972, 1999, and in Japan (the most important non-U.S. superbubble). The ageing cycle and temporary near perfection of fundamentals leave economic and financial data with only one way to go.

Our “Explaining P/E” 4 exhibit says something similar. The first leg down in today’s superbubble was “explained” by rising inflation, which has been the main driver of historical valuations, after an unprecedented lag during the second half of 2021. (Although the most speculative stocks were hit fast and hard from the beginning of 2021.) If anything, the question for us at GMO is why such a historic inflation surge in 2021 did not immediately hit broad market P/Es more substantially: new players in the stock market unfamiliar with inflation? Excessive belief in the Fed’s ability to support markets and hence too much faith that inflation would be transitory? The next leg for the model is likely to be driven by falling margins. Our best guess is that the level of explained P/E will fall toward 15x, compared to the current level of explained P/E of just under 20x, while the actual P/E just rose from 30x to 34x in mid-August in what was probably a bear market rally. (Of course, if the model is indeed driven by falling margins in the near future, then the E will fall as well as the P/E. As you can see, this would imply a substantially lower market than even we have suggested!)

GMO “Explaining P/E” Model

Entering the Superbubbles Final Act_8-22_Exhibit 1.JPG

As of 7/20/2022 | Source: GMO

My papers, “Waiting for the Last Dance” and “Let The Wild Rumpus Begin,” made a simple point: in the U.S., the three near perfect markets with crazy investor behavior and 2.5+ sigma overvaluation have always been followed by big market declines of 50%. The papers said nothing about fundamentals except to expect some deterioration. Now here we are, having experienced the first leg down of the bubble bursting and a substantial bear market rally, and we find the fundamentals are far worse than expected.

The whole world is now fixated on the growth-reducing implications of inflation, rates, and wartime issues such as the energy squeeze. In addition, there are several less obvious short-term problems. Meanwhile, the long-term problems of demographics, resources, and climate are only getting worse and now are beginning to bite even in the short run.

Near-Term Problems

  • The food/energy/fertilizer problems, exacerbated by the war in Ukraine, are even worse in the emerging world (especially Africa) than the European energy problems we have heard about. Russia and Belarus account for 40% of global exports of potash, a key fertilizer, driving wheat/corn/soybean prices to records earlier this year. Increased food and energy prices are causing acute trade imbalances and civil disorder in the most vulnerable countries, as seen for example in the extremely rapid virtual collapse of the Sri Lankan economy. The energy shock is now all but guaranteed to tip Europe into recession; while the U.S. market has a long history of ignoring foreign problems and interactions, global growth is assuredly coming down.
  • In China, which has carried by far the biggest load of global growth for the last 30 years, too many things are going wrong at the same time. The COVID pandemic continues, massively affecting its economy. Simultaneously, the Chinese property complex – key to Chinese economic growth – is now under dire stress. This real estate weakness is mirrored around the world, with U.S. homebuilding for example now declining rapidly to well below average levels, as perhaps it should given the record unaffordability of new mortgages. The situation looks even worse in those countries where mortgages are typically floating rate. Historically, real estate has been the most important asset class for economic stability.
  • We are coming off one of the greatest fiscal tightenings in history as governments withdraw COVID stimulus, both in the U.S. and globally. Historically, there has been a strong relationship between fiscal tightening and subsequent decline in margins (see Appendix). At the same time, the new U.S. excise tax on stock buybacks looks like a harbinger that the U.S. government is beginning to shift its attitude toward the eternal battle between labor and capital (which capital has been winning for many decades now). This may even flow through in time to renewed antitrust action, which would be fantastic for consumers but less fantastic for stock investors.

Longer-Term Problems

  • Population: workers are beginning to be in short supply and will stay that way for the indefinite future in China and the developed world, where no single country is producing babies at replacement rate. 5 Together with rapid ageing, this will be a drag on growth and a push on inflation. Resources: many metals, especially those required for decarbonizing, are in an unavoidable squeeze, lacking sufficient reserves – which currently are a mere 5-20% of what is needed 6 – and capex is woefully low. It simply does not compute, and it makes clear that our existence in any faintly satisfactory condition will depend on our sustained success with replacement, recycling, and new technologies. A second critical resource shortage is fertilizer. Potash and phosphate, both currently mined and both necessary for all life, are: a) finite; and b) very unevenly distributed: Morocco controls 75% of the world's best phosphate, and Russia and Belarus mine 45% of current potash with even more than that mined in Canada. Food: with deteriorated and eroded soil, freshwater shortages, and increasingly resistant pests, food productivity is slowing down even as African population growth outweighs the slowdown elsewhere. The UN global food index was recently at an all-time high.
  • Climate can be seen this year as in danger of spiraling out of control. Never before have major droughts, and dangerously high temperatures and fires, beset China, India, Europe, and North America at the same time. This is severe enough to act as a drag on global GDP: the Rhine, which moves nearly 20% of German heavy traffic, is closed by drought; French nuclear power stations have had to reduce production because rivers are too hot to be used for cooling; China has had to halve its hydropower (18% of its electricity), which has also been reduced in Canada, Norway, India, and elsewhere by low water levels; rising temperatures in India, Asia, and parts of Africa are suddenly high enough to pose health problems for those without air conditioning and outdoor workers, especially farmers. The collective impact of difficult farming weather is beginning to impose its own global costs and may destabilize a growing number of poorer countries in the near future. It is all happening so much faster than anyone expected 10 years ago.
  • All that is to say: these long-term negative issues that I have kept at the back of my mind (and hopefully yours) for years – climate, human fertility, food, and other resources – are now becoming relevant short-term issues that bear on both inflation (upwards) and growth (downwards). Indeed, collectively, they pose a potential risk to our long-term viability.

Prepare for an Epic Finale

Previous superbubbles saw a much worse subsequent economic outlook if they combined multiple asset classes: housing and stocks, as in Japan in 1989 or globally in 2006; or if they combined an inflation surge and rate shock with a stock bubble, as in 1973 in the U.S. and elsewhere. The current superbubble features the most dangerous mix of these factors in modern times: all three major asset classes – housing, stocks, and bonds – were critically historically overvalued at the end of last year. Now we are seeing an inflation surge and rate shock as in the early 1970s as well. And to make matters worse, we have a commodity and energy surge (as painfully seen in 1972 and in 2007) and these commodity shocks have always cast a long growth-suppressing shadow.

Given all these negative factors, it is unsurprising that consumer and business confidence measures are testing historic lows. And in the tech sector, the leading edge of the U.S. (and global) economy, hiring is slowing, layoffs are rising, and CEOs are increasingly bracing for recession. Recently, we have seen a bear market rally. It has so far played out exactly in line with its three historical precedents, the bear market rallies that marked the middle phase of deflating superbubbles. If the bear market has already ended, the parallels with the three other U.S. superbubbles – so far so strangely in line – would be completely broken. This is always possible. Each cycle is different, and each government response is unpredictable. But these few epic events seem to act according to their very own rules, in their own play, which has apparently just paused between the third and final act. If history repeats, the play will once again be a Tragedy. We must hope this time for a minor 7 one.


Basic accounting – the Kalecki equation – shows that government deficits and corporate profits are on opposite sides of a ledger that sums to zero. Historically, there’s been a powerful statistical relationship between changes in the government deficit and subsequent changes in profits margins: major increases in deficits have led to rising profit margins over the next few years, and major decreases in deficits have led to falling profit margins. We have just seen one of the biggest decreases in the government deficit in history. It is very likely to be matched by a subsequent drop in profits.

All occasions since 1960 that the 1-year change in the federal budget balance has been greater than 2% of GDP

Entering the Superbubbles Final Act_8-22_Exhibit 2.JPG

As of 6/30/2022 | Source: BEA, GMO


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Ordinary bubbles are, to us, those that reach a 2 sigma deviation from trend. Superbubbles reach 2.5 sigma or greater. The true U.S. superbubbles – 2.5+ sigma events – are 1929, 2000, and 2021. The honorary member is 1972, the “Nifty Fifty” period. This last one was an “ordinary” just 2-sigma bubble event on price but the market declined 62% in real terms after breaking, still the worst drop since 1929. In some ways, it lacked the crazy speculation of the others but caused, for the only time ever, the highest quality segment (that dominates the S&P 500) to go to a 50% premium versus the rest of the market and to be called “one-decision stocks” because once bought they would be held forever, because they were so good – a belief system bought into by the entire banking establishment that still managed all the money back then. Perhaps, in hindsight, to have the entire system buy into the belief in one-decision stocks – several of which went bust in the following five years – was just as crazy as any other speculation.


Our rough estimate of these times of extreme bullishness and bearishness since 1925.


Nothing annoys the financial establishment more than bearish comments during these bullish frenzies, when so much money is being made by the financial community. Thus, following Propaganda 101, this huge majority of permabulls accuse the tiny minority making bearish comments of being permabears. (Fortunately – he claims – in my case, my actual Quarterly Letters and other reports are on file and available; they earned me the epithet of “value apostate” for my bullish “this time is different” argument from Jim Grant in 2017. The files also show me making bullish cases in both March 2009 in Reinvesting When Terrified and January 2018 in Bracing Yourself for a Possible Near-Term Melt-Up, as well as arguing against the existence of a market bubble in 2016 with Edward Chancellor, no less, the bubble expert – author of Devil Take The Hindmost and The Price Of Time.) Permabulls use the approach of 100% invested at all times and loathe changes in exposure, as if the market were efficient and were not 17 times more volatile in price than is justified by the actual progress of earnings and dividends as proved by Shiller. If you can believe it, you can still read justifications of 1929 as reasonably priced and the 87 crash as a reasonable response to change.


This model does not attempt to justify market prices in any way. It merely shows those financial inputs that have in the past statistically explained contemporaneous P/E multiples.


Except Israel.


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2000 was minor, 1972 major, and 1929, of course, horrific.

Disclaimer: The views expressed are the views of Jeremy Grantham through the period ending August 31, 2022, and are subject to change at any time based on market and other conditions. This is not an offer or solicitation for the purchase or sale of any security and should not be construed as such. References to specific securities and issuers are for illustrative purposes only and are not intended to be, and should not be interpreted as, recommendations to purchase or sell such securities.
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