Sam Bankman-Fried has been sentenced to 25 years in prison for his role in defrauding users of the collapsed cryptocurrency exchange FTX.

In a federal courtroom in lower Manhattan on Friday, US District Judge Lewis Kaplan said the arguments presented by the defense were misleading, logically flawed and speculative.

He said Bankman-Fried had obstructed justice and tampered with witnesses in mounting his defense.

Bankman-Fried apologised to victims of the fraud, saying he had made a series of selfish decisions while leading FTX and threw it all away.

He noted that his decisions haunt him to this day.

Prosecutors had sought as much as 50 years, while Bankman-Fried’s legal team argued for no more than 6-and-a-half years.

Bankman-Fried was convicted on seven criminal counts in November.