NEW YORK - Sam Bankman-Fried was sentenced to 25 years in prison by a judge on Thursday (March 28) for stealing US$8 billion (S$10.8 billion) from customers of the now-bankrupt FTX cryptocurrency exchange he founded, the last step in the former billionaire wunderkind's dramatic downfall.

US District Judge Lewis Kaplan handed down the sentence at a Manhattan court hearing after rejecting Bankman-Fried's claim that FTX customers did not actually lose money and finding that he lied during his trial testimony.

A jury found Bankman-Fried, 32, guilty on Nov 2 on seven fraud and conspiracy counts stemming from FTX's 2022 collapse in what prosecutors have called one of the biggest financial frauds in US history.

Kaplan said Bankman-Fried has shown no remorse.

"He knew it was wrong," Kaplan said. "He knew it was criminal. He regrets that he made a very bad bet about the likelihood of getting caught. But he is not going to admit a thing, as is his right."

Bankman-Fried, wearing a beige short-sleeve jail T-shirt, acknowledged during 20 minutes of remarks to the judge that FTX customers had suffered and he offered an apology to his former FTX colleagues - but did not admit criminal wrongdoing.

He has vowed to appeal his conviction and sentence.

Bankman-Fried stood with his hands clasped before him as Kaplan read the sentence. He then spoke with his defence lawyer Marc Mukasey briefly before being led out of the courtroom by members of the US Marshals Service.

The sentence marked the culmination of Bankman-Fried's plunge from an ultra-wealthy entrepreneur and major political donor to the biggest trophy to date in a crackdown by US authorities on malfeasance in cryptocurrency markets.

"There are serious consequences for defrauding customers and investors," US Attorney-General Merrick Garland said in a statement. "Anyone who believes they can hide their financial crimes behind wealth and power, or behind a shiny new thing they claim no one else is smart enough to understand, should think twice."

Kaplan found that FTX customers lost US$8 billion, FTX's equity investors lost US$1.7 billion, and that lenders to the Alameda Research hedge fund Bankman-Fried founded lost US$1.3 billion. He imposed an US$11 billion forfeiture order and authorised the government to repay victims with seized assets.

Federal prosecutors had sought a sentence of 40 to 50 years. Mukasey had argued for a sentence of less than 5-1/4 years.

'I'm sorry for that'

Addressing the judge, Bankman-Fried said, "Customers have been suffering ... I didn't at all mean to minimise that. I also think that's something that was missing from what I've said over the course of this process, and I'm sorry for that."

Referring to his FTX colleagues, Bankman-Fried added, "They put a lot of themselves into it, and I threw that all away. It haunts me every day."

Three former close associates testified as prosecution witnesses that Bankman-Fried had directed them to use FTX customer funds to plug losses at Alameda Research. All three have pleaded guilty to fraud.

Kaplan said Bankman-Fried lied when testified that he did not know Alameda Research had spent customer deposits taken from FTX.

Mukasey sought to distance Bankman-Fried from notorious fraudsters like Bernie Madoff, saying he was "not a ruthless financial serial killer" but rather an "awkward math nerd" who tried to get customers their money back after FTX's collapse.

"Sam Bankman-Fried doesn't make decisions with malice in his heart," Mukasey added. "He makes decisions with math in his head."

Bankman-Fried's eyes turned red as he appeared to hold back tears while Mukasey spoke.

His parents, Stanford University law professors Joseph Bankman and Barbara Fried, attended the sentencing. Bankman held a green umbrella as they exited the courthouse into a rainy New York afternoon, their arms around each other.

"We are heartbroken and will continue to fight for our son," they said in a statement.

'Power and influence'

A Massachusetts Institute of Technology graduate, Bankman-Fried rode a boom in the values of bitcoin and other digital assets to a net worth of US$26 billion, according to Forbes magazine, before he turned 30.

Bankman-Fried became known for his mop of unkempt curly hair and commitment to a movement called effective altruism, which encourages talented young people to focus on earning money and giving it away to worthy causes.

He was one of the biggest contributors to Democratic candidates and causes before the 2022 US midterm elections. Kaplan pointed to trial evidence showing Bankman-Fried also donated to Republicans through "straw" donors to hide his involvement.

The judge called Bankman-Fried's efforts to present himself as a "good guy" an act, adding, "The goal was power and influence."

Bankman-Fried has been detained at the Metropolitan Detention Center in Brooklyn since August 2023, when Kaplan revoked his bail after finding he likely tampered with witnesses at least twice. Kaplan said he would recommend Bankman-Fried be sent to a prison close to San Francisco.

Source: Reuters