Traders who bet against the "Magnificent 7" group of big US tech stocks booked their biggest-ever weekly profit of more than US$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 US$3 billion in profit.

Tesla, whose shares have lagged peers in the coveted group this year, also tumbled by an equal margin, leading to US$3 billion in profits for short sellers.

Bets against Microsoft and Apple yielded US$1 billion in profit each last week, according to the data.

The tech-heavy Nasdaq and the benchmark S&P 500 suffered six straight sessions of declines last week, their longest losing streak since October 2022, as the evidence of US economic resilience and still-high inflation diminished hopes of an interest rate cut anytime soon.

Overall, the "Magnificent 7" shed close to US$1 trillion in market capitalization last week, according to LSEG data.

Tesla, Meta Platforms, Alphabet and Microsoft will be in focus this week as the companies gear up to deliver their quarterly numbers.

"Weak iPhone sales data, poor delivery numbers from Tesla and regulatory pushback in the EU and the USA may all be weighing on sentiment, but the impact of the markets' view on the direction of interest rates cannot be underestimated, either," AJ Bell investment director Russ Mould said.

"Investors will be looking to six of them for reassurance when they report quarterly numbers," Mould added.

  - Reuters