That has built unease among regulators, investors and traders over these so-called pod shops. And while Citadel's billionaire founder has vocally opposed any notion that his firm and rivals pose systemic risks and need more regulation, even he acknowledges that crowded trades could lead to widespread losses if all of them head for the exits at once.
"Could you see the multimanager hedge funds take a joint 10, 15, 20% hit to their equity? It's possible," Griffin said during a Nov. 9 interview at a Bloomberg conference in Singapore, calling such a drop "painful, but not systemic."
Citadel, Millennium Management and Balyasny Asset Management are the leaders in a strategy that divvies up money across dozens or even hundreds of teams that operate somewhat independently across a range of markets and strategies.
Their success in the past several years has drawn new investors and competitors. Yet overcrowding in some bets, increased market volatility, an expensive talent war and lower returns this year have prompted market participants to question whether the world of high finance is approaching peak pod.
Officials at the Securities and Exchange Commission and U.S. Treasury Department have warned that the firms' favored basis trade could destabilize Treasury markets. At least one large bank is approaching the limit of how much it's willing to lend to them, and some investors are growing more wary.
"There's some overcrowding and concern about the amount of leverage at individual firms and collectively," John Jackson, head of hedge fund research at investment consultant Mercer, said during a recent Capital Allocators podcast. And because they typically cut risk very quickly "we are worried about the potential snowball effect."
Some investors are capping the amount of money they allocate to these funds, fearing blowups. Others are avoiding newer entrants, saying they could be hurt the most by a big unwinding. Smaller hedge funds, meanwhile, are looking for ways to profit from the market dislocations these larger competitors create.
It all amounts to a fault line in what has been a largely envied corner of the hedge fund universe — where pod shops have attracted more assets and star talent, driven up compensation and generated years of steady returns for investors.
As of midyear, there were 55 pod shops — multistrats and single strategy — overseeing $368 billion, with about half that amount controlled by the five biggest firms, according to a September Goldman Sachs Group report. That's up from 29 firms running a combined $149 billion in 2018.
Some smaller firms are struggling amid the increased competition. Schonfeld Strategic Advisors has barely made money this year and investors have pulled $2.3 billion from its funds. It almost partnered with Izzy Englander's Millennium, a much larger rival, but instead found new and current clients who said they'd be willing to invest up to $3 billion. Even with more assets and stiffer competition, Citadel continues to be among the most aggressive risk-takers.
While Griffin's firm gets high marks from S&P Global Ratings for sound risk management, healthy cash levels and sticking to liquid investments, the credit-grading company called Citadel's appetite for opportunistic, concentrated bets a negative, highlighting its big wagers on natural gas and power — sectors prone to large price swings — in 2021 and 2022.
Citadel gained 38% last year, with about $8 billion — half the profits of its main hedge fund — coming from commodities, according to people familiar with the matter.
"We are in the risk-taking business," Citadel spokesman Matt Scully said in a statement. "Our investors expect us to deploy their capital against the most attractive opportunities we see in the market."