(Reuters) - Traders who bet against the "Magnificent 7" group of big U.S. tech stocks booked their biggest-ever weekly profit of more than $10 billion last week, with the biggest gains coming from their short position in shares of Nvidia and Tesla, Ortex data showed.

The chip designer shed almost 14% last week to clock its worst weekly fall in over 19 months, helping short sellers rake in more than $3 billion in profit.