The 2022 equity-bond selloff refers to a period during which equities and government bonds in most major developed markets declined simultaneously, breaking with the reliably negative correlation that had characterised the relationship between these two asset classes for much of the preceding two decades. The episode is widely cited in discussions of portfolio diversification and correlation risk as a clear illustration of how relationships between asset classes that appear stable over long historical periods can shift when the underlying macroeconomic environment changes.
Background: the prior pattern of negative correlation
For most of the two decades preceding 2022, equities and government bonds had displayed a reliably negative correlation. When equity markets declined, government bond prices tended to rise, and vice versa. This pattern reflected a specific macroeconomic regime, in which the primary driver of equity market weakness was typically slowing economic growth rather than rising inflation. Under these conditions, government bonds tended to perform well during equity downturns, both because investors sought the relative safety of sovereign debt and because central banks were generally inclined to lower interest rates in response to slowing growth, which supported bond prices. This negative correlation formed the basis for widely used approaches to portfolio construction, in which a combination of equities and bonds was expected to provide meaningful diversification, since losses in one asset class were, on average, expected to be offset to some degree by gains in the other.
What changed in 2022
The macroeconomic driver behind market conditions changed substantially in 2022. Rather than slowing growth being the primary concern, persistently high inflation became the dominant macroeconomic issue, prompting central banks to pivot sharply toward aggressive monetary tightening. This shift in the underlying macro regime altered the relationship between equities and bonds. Rising interest rates, intended to bring inflation under control, reduced the present value of future corporate earnings, which weighed on equity valuations, while simultaneously and directly reducing the prices of existing bonds, particularly those with longer duration, since bond prices and prevailing interest rates move in opposite directions. As a result, both equities and bonds declined together during 2022, rather than moving in the offsetting directions that investors had come to expect based on the preceding two decades of experience.
Toby Watson’s interpretation of the episode
Toby Watson, a finance professional whose career included nearly seventeen years at Goldman Sachs across structured finance and global credit markets before he joined Rampart Capital as a partner in 2020, has pointed to the 2022 equity-bond selloff as illustrating how correlation is regime-dependent rather than structurally fixed. For Watson, this episode demonstrates that treating historical correlation statistics as reliable guides to future portfolio behaviour is a form of risk that deserves more attention than it typically receives, since the negative correlation between equities and bonds that many investors had come to rely upon was, in fact, specific to a particular macroeconomic regime rather than a permanent structural feature of these two asset classes.
Implications for portfolios relying on traditional diversification
The 2022 episode had significant implications for portfolios constructed on the assumption that equities and bonds would continue to display a negative correlation. Portfolios that depended heavily on this relationship for risk management experienced a period in which the anticipated diversification benefit failed to materialise at precisely the time it was most needed, since both major components of a typical diversified portfolio declined simultaneously. This is generally cited as a clear demonstration of the broader principle that diversification benefits, which appear robust when assessed under one set of macroeconomic conditions, can diminish or disappear entirely when those conditions change.
A lesson in reassessing diversification assumptions
Watson’s broader view is that reassessing diversification assumptions requires examining the underlying drivers of return for each asset within a portfolio, rather than relying solely on historical correlation statistics calculated over a particular period. Drawing on his experience at Goldman Sachs analysing how different financial instruments behave across changing macro regimes, he has suggested that the key question for investors, in light of episodes such as the 2022 selloff, is whether the factors that historically produced a particular pattern of correlation between holdings still apply in the current environment, or whether that pattern was contingent on conditions that have since changed.
Broader significance for portfolio construction
The 2022 equity-bond selloff is frequently referenced as a concrete, real-world example within broader discussions of regime-dependent correlation and the limitations of relying on long-run historical statistics for portfolio construction. Watson has suggested that the practical response to episodes of this kind is not to abandon diversification as a principle, but to pursue it more carefully, with explicit attention to whether the factors underlying a given diversification relationship remain applicable to the current macroeconomic regime. Among the disciplines he has proposed in this context are assessing the macro regime dependency of each diversification relationship within a portfolio, and stress-testing portfolios against scenarios in which correlations between major holdings increase simultaneously, ideally before, rather than after, market conditions deteriorate.
