Wall Street Math Wizards Are Decoding Private-Market Returns

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Times are tough in private markets. High borrowing costs are hurting returns, managers are struggling to exit investments, and regulators are circling. All that is bringing back an issue that has long haunted these opaque holdings: No one is quite sure how to actually measure their performance.

Barry Griffiths is one of a small group of quantitative analysts giving it a try. He’s the driving force behind an alternative method for gauging unlisted investments that he says has the potential to demystify the world of private markets, from buyout funds to venture capital. The claim is it will help investors compare returns with those of other asset classes, as well as reveal the true value provided by managers in the business along the way.