The Best Investment Writing Volume 4: Rob Arnott, Research Affiliates – Bubble, Bubble, Toil and Trouble

Episode Summary

Executive Summary: Rob Arnott presents Research Affiliates’ case for real-time identification of bubbles and anti-bubbles. He argues that cap-weighted indexes amplify overpriced assets, while value-oriented smart beta and global contrarian opportunities—especially UK stocks and emerging-market SOEs—offer better forward returns than high-flying tech, Tesla, or crypto.

Main Topics: Defining bubbles and anti-bubbles in real time (Priority: 5/5): Arnott explains the formal bubble definition used by Research Affiliates: an asset whose valuation cannot be justified with plausible cash-flow assumptions and whose marginal buyer ignores valuation. He pairs this with the concept of an anti-bubble, where pessimism is implausibly extreme. Technology stocks as a modern bubble risk (Priority: 5/5): The episode revisits the concentration of mega-cap tech in global indexes and argues that some names are priced near perfection. Arnott distinguishes between firms like Apple and Microsoft, which may not be bubbles, and more speculative names such as Tesla, Netflix, Tencent, and Twitter. Bitcoin and cryptocurrencies as speculative assets (Priority: 4/5): Cryptocurrencies are presented as having little fundamental support because they produce no cash flows and rely on the expectation of selling to a future buyer. Arnott argues that, despite volatility and rebound, the bubble case remains intact. Why market-cap-weighted indexes can be dangerous (Priority: 5/5): Because cap-weighted indexes automatically assign more weight to rising prices, they increasingly concentrate exposure in expensive winners. Arnott argues this creates implicit bets on overvalued assets and makes investors vulnerable when bubbles unwind. Actionable contrarian investing: value smart beta and global anti-bubbles (Priority: 5/5): Rather than shorting bubbles, Arnott recommends avoiding them and seeking undervalued assets. He highlights value-oriented smart beta, emerging-market value, state-owned enterprises, and UK equities as examples of anti-bubble opportunities. Market myopia vs. market hyperopia (Priority: 3/5): The talk closes with the idea that markets may be overly focused on distant growth stories while ignoring current cash-generating businesses. He suggests today’s market is discounting either the distant future or 'the hereafter' for certain assets.

Key Arguments: A bubble can be identified in real time if the asset’s price requires implausible growth assumptions and buyers ignore valuation models. The most useful response to bubbles is not aggressive shorting, but simply avoiding exposure and reallocating toward cheaper assets. Cap-weighted indexes mechanically increase exposure to the most expensive stocks, making them structurally vulnerable in bubble environments. Large tech companies can be richly valued without necessarily being bubbles if their cash flows make aggressive assumptions plausible; other names require far more heroic assumptions. Bitcoin and many cryptocurrencies remain speculative because they have no cash flows and depend entirely on the belief that someone else will pay more later. Several markets outside the U.S. look attractive on valuation grounds, especially UK equities and emerging-market value strategies. Selected emerging-market state-owned enterprises appear deeply undervalued, with high dividends and low P/B and P/E ratios, though political risk remains. Investors should seek anti-bubbles—assets priced for extreme pessimism—because they can offer strong long-term risk premiums.

Data Points: RAFI assets managed: over $140 billion - Research Affiliates’ strategies are used globally across funds and other vehicles. Best Investment Writing volume: Volume 4 - This episode is part of an audio reading of the anthology. Initial bubble article date: April 2018 - 'Yes, it’s a bubble. So what?' was published then. Top global tech concentration: 7 of the 8 largest stocks - In late 2018, seven of the eight largest companies in the world were tech firms. FANMAG weight in Russell 1000: over 14% - Concentration of Facebook, Amazon, Netflix, Microsoft, Apple, and Google in the index. FANMAG share of Russell 1000 return: nearly 40% - These six stocks drove a large portion of the index’s 2018 return over the first nine months. Average FANMAG return: just over 40% - Performance over the first nine months of 2018. FANMAG decline in Q4 2018: average of 21% - The group sold off sharply before recovering in early 2019. S&P 500 decline in May 2019: over 6% - General market drop during a volatile period. FANMAG decline in May 2019: nearly 15% - Illustrates how expensive stocks react more violently to bad news. Crypto market cap peak: $828 billion - Peak universe market capitalization in early January 2018. Crypto market cap at year-end 2018: $125 billion - Universe of cryptocurrencies after the selloff. Crypto drawdown: 84% - Drop from peak to end of 2018. Crypto paper wealth lost: over $700 billion - Aggregate decline in market value. Bitcoin rebound: 187% - Recovery through the first half of 2019. Tesla share price decline: 32% to $223 - Price fell over the first six months of 2019. Tesla first reached $223: January 2016 - Most investors since then were likely underwater. MSCI UK dividend yield: 4.5% - Used to support the UK anti-bubble case. UK valuation discount to MSCI World: 25% - UK stocks traded at 13.8x earnings versus the world market. UK earnings multiple: 13.8x - MSCI UK index valuation. Emerging-market SOE dividend yield: 4.2% - Weighted average yield of the top 50 state-owned enterprises. MSCI Emerging Markets dividend yield: 2.2% - Benchmark for comparison to SOE basket. SOE P/B ratio: 1.03 - Weighted average price-to-book of the top 50 emerging-market SOEs. EM index P/B ratio: 1.61 - Broader MSCI Emerging Markets Index price-to-book. SOE P/E ratio: 8.9 - Weighted average earnings multiple of the SOE basket. EM index P/E ratio: 13.5 - Broader market comparison. Valuation discount on P/B: 36% - SOEs vs. MSCI Emerging Markets Index. Valuation discount on P/E: 34% - SOEs vs. MSCI Emerging Markets Index. Projected value advantage for EM value strategies: 2% to 4% - Expected outperformance over cap-weighted counterparts.

Pivotal Quotes: "We identify a bubble as having two characteristics." — Rob Arnott: He introduces the paper’s real-time definition of a bubble. "The Achilles heel of cap weighting is that it links the weight directly to the price." — Rob Arnott: Explaining why market-cap-weighted indexes become concentrated in expensive stocks. "We are discounting the hereafter." — Rob Arnott: Closing reflection on how markets price bubble assets and anti-bubbles.

Implications: Investors should avoid chasing popular, richly valued assets and be wary of cap-weighted index concentration. Better long-term opportunities may lie in undervalued, unpopular markets and value-oriented smart beta strategies.