Bubbles are all different – and all the same
No matter what you’ve got a bubble in, their structure is always the same, says Merryn Somerset Webb. Right now, we’re in the “mania” phase.


The stories that drive bubbles change – but their structure does not. TS Lombard has a note reminding us of how they usually unfold. Bubbles start with rising awareness of a story driven by growing media attention (this is when the institutional investors move in). Next comes a cycle of growing enthusiasm (as individuals move in), followed by greed and Fomo (“fear of missing out”), before a mania develops and we reach yet another “new paradigm” characterised by academics explaining why markets have now reached a “permanently high plateau”. After that comes the crash, and the denial, fear and capitulation that are required before we can start all over again.
It seems pretty clear that we are now well into the mania bit. You can see it in US valuations. You can see it in the huge pick-up in individual investor activity (small investors are having fun all over markets); in the enthusiastic rise in merger and acquisition activity (see this week's magazine for how even dismal Debenhams is being bought out); in the boom in special purpose acquisition company (SPAC) listings; and in the general bonkers-ness of hardcore bitcoin fans. That people might have gone a bit mad is also reflected in a small story this week – there is a UK market on decommissioned London Underground station lift buttons.
But one particularly interesting place to look for it is in margin debt (the extent to which investors have borrowed to buy). In the 12 months to December 2020, US investor margin debt rose by $200bn. This is “sobering”, say Gavekal analysts. Why? Because the last two times that margin debt hit new records like this (in March 2000 and July 2007), things ended very badly indeed. So is disaster ahead – or third time lucky?
Subscribe to MoneyWeek
Subscribe to MoneyWeek today and get your first six magazine issues absolutely FREE

Sign up to Money Morning
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
This brings us to our very own new paradigm: the key difference today is that in 2000 and 2007 the debt met Federal Reserve tightening. This time it does not. Instead, monetary growth is genuinely unprecedented (look at a 30-year chart and you will see that M1 growth rarely goes above 10%. It’s now hitting 70%). “The Fed seems only too happy to add fuel to the fire of rampant speculation.” The reason to believe that the mania has further to run (possibly much further) is as simple as you can get. None of that tricky techy stuff we had to get our heads round in 2000. No, this time it’s just about money. There’s lots of it about. If you haven’t got any, it’s easy to borrow – or in the US just wait for your next stimulus cheque. Too much money tends to produce silliness (not just in markets) – and that’s exactly what it is doing right now. There is no need to try and make it much more complicated than that.
You’ll want to protect yourself a bit. Stay out of all derivative markets (never bet against exuberance) and find some non-bubbly stuff to buy. Note that the not-very-expensive UK market is more than the useless old codger of global investing you think it is and that commodities can give you the same play on the coming explosion of vaccine-released pent-up demand as the equities you love – just at a lower price. Finally I suspect the best thing to do for yourself right now is to book a holiday. Indeed, if you have been or are soon-to-be vaccinated and you can afford to travel, it is almost your duty to the global economy to do so. Just don’t forget to buy insurance first.
Sign up for MoneyWeek's newsletters
Get the latest financial news, insights and expert analysis from our award-winning MoneyWeek team, to help you understand what really matters when it comes to your finances.
Merryn Somerset Webb started her career in Tokyo at public broadcaster NHK before becoming a Japanese equity broker at what was then Warburgs. She went on to work at SBC and UBS without moving from her desk in Kamiyacho (it was the age of mergers).
After five years in Japan she returned to work in the UK at Paribas. This soon became BNP Paribas. Again, no desk move was required. On leaving the City, Merryn helped The Week magazine with its City pages before becoming the launch editor of MoneyWeek in 2000 and taking on columns first in the Sunday Times and then in 2009 in the Financial Times
Twenty years on, MoneyWeek is the best-selling financial magazine in the UK. Merryn was its Editor in Chief until 2022. She is now a senior columnist at Bloomberg and host of the Merryn Talks Money podcast - but still writes for Moneyweek monthly.
Merryn is also is a non executive director of two investment trusts – BlackRock Throgmorton, and the Murray Income Investment Trust.
-
Hargreaves Lansdown slashes fees for ISA and SIPP investors - how does it compare to other providers?
Hargreaves Lansdown, the UK’s biggest investment platform, has dropped its fees by 40%, to their lowest ever level, for certain customers. Is it a good deal, and how does it compare to other providers?
By Ruth Emery
-
BP's 'long, painful decline' – and why next year could be even tougher
Opinion Long-suffering shareholders in oil giant BP have been pushing for change. It won’t come soon enough, says Matthew Lynn
By Matthew Lynn
-
BP's 'long, painful decline' – and why next year could be even tougher
Opinion Long-suffering shareholders in oil giant BP have been pushing for change. It won’t come soon enough, says Matthew Lynn
By Matthew Lynn
-
Investment trusts tap the profits in exotic and obscure global markets
Opinion Peter Walls, manager of the Unicorn Mastertrust fund, highlights three investment trusts as he shares where he'd put his money
By Peter Walls
-
Falling revenues and mounting debt spell trouble for Jumia Technologies
Struggling African e-commerce platform Jumia Technologies looks headed for the exit, says Dr Matthew Partridge.
By Dr Matthew Partridge
-
Next reports £1 billion in annual profits for the first time – what's next for the retailer?
Clothing retailer Next has become only the fourth member of its sector to surpass £1 billion in annual profits. What does this mean for the company's future?
By Dr Matthew Partridge
-
Best of British bargains: cash in on undervalued companies in the UK stock market
Opinion Michael Field, Chief Equity Market Strategist, EMEA, Morningstar, selects three attractive UK stocks where he'd put his money
By Michael Field
-
Building firm Keller presents low debt and ample scope for growth
Geotechnical contractor Keller, which supports vital global infrastructure, boasts rising profits and a cheap valuation
By Dr Mike Tubbs
-
PZ Cussons share price down 75% in last decade – why it's one to watch
Opinion Once-strong consumer-goods business PZ Cussons is out of favour with the market. That spells opportunity for investors, says Jamie Ward
By Jamie Ward
-
Cash in on the biotech sector with specialist trust BioPharma
Opinion BioPharma has an attractive niche in lending to asset-rich biotechnology companies
By Rupert Hargreaves