Asset Correlation and Portfolio Risk
The central problem of institutional portfolio management is not maximising return — it is optimising risk-adjusted return. A portfolio that delivers 20% annual return with 30% volatility is inferior, from a Sharpe ratio perspective, to one that delivers 12% with 8% volatility. This is why modern portfolio theory places correlation at the heart of asset allocation: diversification reduces portfolio variance only to the extent that constituent assets do not move together.
For most of the past forty years, institutional investors have benefited from relatively low correlation between equities, bonds, and commodities. Traditional 60/40 portfolios worked because when stocks fell, bonds rose. That relationship has been deteriorating since the 2008 financial crisis, and it has broken down almost entirely in the post-pandemic era of coordinated central bank policy. Today, when risk-off sentiment arrives, nearly all liquid asset classes sell off simultaneously. Diversification — the so-called 'only free lunch' in finance — has become considerably more expensive.
The reason is liquidity. High liquidity is generally seen as beneficial: it allows investors to enter and exit positions with minimal price impact. But high liquidity also means low friction, and low friction means that capital flows respond immediately to macroeconomic signals. When the US Federal Reserve raises interest rates, money flows out of emerging market equities within hours. When inflation expectations shift, commodity prices adjust within minutes. The globalisation of financial markets and the rise of algorithmic trading have turned once-distinct asset classes into points on a single surface, responsive to the same underlying drivers.
This is where low liquidity, paradoxically, becomes an advantage. Assets that cannot be traded instantaneously — such as direct real estate, private equity, or litigation claims — are structurally insulated from the hot money flows that drive cross-asset correlation. They cannot be sold in a panic. Their valuations do not respond to quarterly earnings reports or shifts in central bank forward guidance. They occupy a different temporal dimension from publicy traded securities.
Litigation finance is an extreme example of this phenomenon. The value of a commercial arbitration claim in Mumbai does not change when the S&P 500 falls, nor does it rise when bond yields compress. Legal outcomes are driven by the strength of evidence, the quality of representation, the procedural history of the case, and the enforceability of any resulting award. These factors are entirely orthogonal to macroeconomic cycles. A portfolio of twenty litigation investments, properly diversified by jurisdiction, case type, and counterparty, will generate returns that are uncorrelated not only with equities and bonds but also with each other — provided the underlying cases arise from independent legal disputes.
This is not a theoretical benefit. Empirical studies of litigation finance returns — including data published by the International Legal Finance Association and by listed litigation funders — show near-zero correlation to public equity indices, to high-yield credit, and to most alternative asset classes. For institutional investors managing large, multi-strategy portfolios, even a modest allocation to litigation finance (5–10% of total AUM) can have a disproportionate effect on the overall portfolio Sharpe ratio, precisely because the returns arrive independently of other positions.
At Five Rivers Capital, we structure our portfolio explicitly to preserve this decorrelation. We avoid concentration in any single industry or legal issue. We limit exposure to cases affected by the same regulatory change or the same counterparty. We model each case's contribution to total portfolio variance and actively manage concentration risk to ensure that the fund's return stream remains genuinely uncorrelated to broader market movements. The goal is not merely to generate attractive standalone returns — it is to deliver returns that arrive when diversification is most valuable: when traditional asset classes are moving in lockstep.
