Benchmarks' Stealthy Impact

The Hidden Cost of Volatility Drag

Volatility drag is a persistent yet often overlooked force that can significantly hinder portfolio performance over time. This phenomenon occurs when the compounded growth of a portfolio is held back by periods of high volatility, which erode returns and leave investors with smaller gains than they would have seen in a steadier market environment.

Despite its potential to inflict damage on investment outcomes, many investors remain unaware of this hidden cost. In the following sections, we'll explore how benchmarks can act as limits to arbitrage and contribute to the existence of the low-volatility anomaly, which has confounded traditional finance principles for decades.

Benchmarks as Limits to Arbitrage: The Low-Volatility Anomaly

A growing body of research suggests that benchmarks can act as constraints on investor behavior, discouraging arbitrage activity in both high-alpha, low-beta stocks and low-alpha, high-beta stocks. This dynamic may help explain the long-term success of low-volatility and low-beta stock portfolios, which have offered an enviable combination of high average returns and small drawdowns since 1968.

The low-risk anomaly runs counter to the fundamental principle that risk is compensated with higher expected return. In their study, Malcolm Baker, Brendan Bradley, and Jeffrey Wurgler found that a dollar invested in the lowest-volatility portfolio in January 1968 increased to $59.55 by December 2008 – significantly outperforming its high-volatility counterparts.

Behavioral Models of Security Prices: Irrationality and Limits on Arbitrage

Behavioral models of security prices combine two key ingredients: irrational market participants and limits on arbitrage. In the context of the low-risk anomaly, researchers believe that a preference for lotteries and well-established biases such as representativeness and overconfidence lead to an unjustified demand for higher-volatility stocks.

However, it is not just individual investors who contribute to this phenomenon. Institutional investors with fixed-benchmark mandates may also be discouraged from investing in low-volatility stocks due to the nature of their contracts, which can increase the demand for higher-beta investments and further exacerbate the low-volatility anomaly.

Portfolio Implications: Opportunities in Low-Volatility Stocks

Despite the challenges posed by benchmarks as limits to arbitrage, there are opportunities for investors to capitalize on the low-volatility anomaly. By focusing on high-quality, large-cap stocks with lower volatility profiles – such as C, GS, QUAL, BAC, and MS – investors can potentially benefit from the higher average returns and smaller drawdowns associated with this strategy.

That said, it is important to recognize that low-volatility stocks may not always outperform their high-volatility counterparts, particularly in certain market conditions or during prolonged bull markets. As such, a well-diversified portfolio that accounts for various risk factors and market scenarios is essential for long-term success.

Actionable Insight: Embrace the Low-Volatility Anomaly

In today's environment of heightened market volatility, embracing the low-volatility anomaly can provide investors with a valuable strategy for navigating uncertain waters and achieving their financial goals. By incorporating high-quality, lower-risk stocks into their portfolios, investors may be able to reap the rewards of this persistent market phenomenon while simultaneously managing downside risk.