"Bill Hwang is entirely innocent of any wrongdoing," his lawyer Lawrence Lustberg said in a statement. "There is no evidence whatsoever that he committed any kind of crime, let alone the overblown allegations that pervade this indictment." Mr. Lustberg said Mr. Hwang had been cooperative with investigations into Archegos.
The CFO's lawyer, Mary Mulligan, said in a statement, "Pat Halligan is innocent and will be exonerated."
The indictment unsealed Wednesday said Archegos's market positions ballooned to $160 billion at one point through a deceptive trading tactic that hid their true size from the market. The positions were inflated with the use of borrowed money and derivative securities that required no public reporting. When the market turned against the positions in March 2021, Mr. Hwang directed the fund's traders to go on a buying spree in an attempt to prop up their price, federal prosecutors charged.
Speaking at a white-collar crime conference in New York Wednesday morning, Deputy U.S. Attorney General Lisa Monaco said the case against Messrs. Hwang and Halligan "really typifies and exemplifies the focus we are placing on holding individuals accountable when it comes to corporate crime and when it comes to corporate malfeasance."
Archegos, Mr. Hwang's family office, imploded after amassing a concentrated portfolio of stocks by using borrowed money. It collapsed after some of the shares tumbled, triggering margin calls from banks, which then dumped Mr. Hwang's holdings. Banks lost more than $10 billion, prompting the departures of several senior executives and probes into the way firms monitor the risks run by their businesses serving hedge funds.
Fortunes diverged among the firms that Archegos dealt with: Credit Suisse Group, Nomura Holdings and Morgan Stanley incurred some of the steepest losses. Others, including Goldman Sachs Group, Wells Fargo and Deutsche Bank, escaped relatively unscathed.
Prosecutors said Messrs. Hwang and Halligan "repeatedly made materially false and misleading statements about Archegos's portfolio of securities to numerous leading global investment banks and brokerages," which encouraged them to trade with and extend credit to Archegos, the government said.
Among the securities allegedly manipulated by Mr. Hwang were ViacomCBS, Discovery Communications, Tencent Music Group, Texas Capital Bancshares and Rocket Companies.
The criminal conduct allegedly involved concealing and deceiving the true size of the fund's positions, liquidity and concentration from counterparties, by spreading the trades around with several different banks. When the banks began asking the fund about the size of its positions, it typically claimed any single holding was no more than 35% of its capital; in truth, prosecutors said, its holdings in Viacom at one point were equivalent to 96% of its capital.