Odd Lots

Citi's Dirk Willer on How You Know When the Bubble Is Over

November 15, 2025

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  • Dirk Willer defines a market bubble as asset price appreciation exceeding two standard deviations above the long-term real trend, noting that historically, the correct move upon entering bubble territory is to buy, as these phases tend to continue rising before an eventual, bad-ending correction. 
  • Sentiment indicators, such as those tracked by Willer's 'Paul's indicator' and asset allocator surveys, have not reached the extreme levels typically seen at market tops, suggesting the current market, while potentially a bubble, is not yet at its peak. 
  • A key technical warning sign for exiting a bubble, according to Willer's framework, is when three of the top seven market leaders break below their 200-day moving average, a signal that has historically worked well in identifying downside risk after the initial bubble entry. 

Segments

Market Volatility and Bubble Concerns
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(00:01:59)
  • Key Takeaway: Market volatility is increasing, bringing renewed focus on potential AI bubbles and the failure of traditional safe havens like bonds to rally.
  • Summary: Hosts discuss the current market interest due to volatility, noting that traffic follows volatility. They observe the S&P 500 sliding, raising concerns about tech valuations and the AI bubble, while noting that bonds are not acting as a safe haven.
Guest Introduction and Sentiment Check
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(00:05:23)
  • Key Takeaway: Sentiment indicators have not reached the extreme levels typically seen at market tops, suggesting the rally may not be over, despite bubble characteristics.
  • Summary: Dirk Willer is introduced. He notes that bears have disappeared recently due to optimism about a year-end rally. He discusses his sentiment indicators, which suggest that while bubble territory may have been entered, extreme enthusiasm is missing.
Historical Bubble Analogies
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(00:11:09)
  • Key Takeaway: The 2000 dot-com bubble is the closest analogy due to its tech focus and capital expenditure build-out, but current conditions might not reach the same level of mania.
  • Summary: Willer compares the current environment to the 2000 dot-com bubble, recalling extreme analyst pitches. He notes that focusing too much on 2000 might be risky, as it was an extreme event, but many elements rhyme.
Defining and Timing a Bubble
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(00:21:10)
  • Key Takeaway: A bubble is defined as returns exceeding two standard deviations above the long-term real trend; a key technical warning sign is when three of the top seven market leaders break their 200-day moving average.
  • Summary: Willer explains his quantitative definition of a bubble. He notes that once in bubble territory, returns tend to continue rising, but eventually, most gains are given back. He outlines a technical rule based on the performance of market leaders to signal danger.
Gold’s Divergent Performance
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(00:26:40)
  • Key Takeaway: Gold’s rally was initially driven by central bank diversification, but more recently by retail-driven debasement fears, leading to caution on short-term positioning.
  • Summary: The hosts discuss why gold is rallying alongside stocks. Willer attributes the move to central banks diversifying and retail investors fearing currency debasement, noting that the latter has made the trade retail-driven and potentially overextended.
Hedging Strategies in a Bubble
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(00:30:16)
  • Key Takeaway: Traditional hedges like S&P put spreads are often ineffective in bubbles; credit or currency structures that bet on a weaker dollar alongside lower S&P prices are more viable.
  • Summary: Willer discusses hedging, noting that out-of-the-money puts are useless if the bubble inflates further. He suggests credit offers protection if the labor market fails, or looking at dollar/equity correlations.
Lessons from Emerging Markets for the US
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(00:34:35)
  • Key Takeaway: The primary lesson from EM is the importance of political risk, which is becoming more relevant in the US as governance stability is increasingly questioned.
  • Summary: Willer discusses the premise that the US is becoming like an EM. He defines EM based on whether government bonds act as safe havens or credit during risk-off events. He concludes that political risk is the main lesson applicable to the US now.