Jack Pitcher

on Friday after a string of positive news about its flagship weight loss drug, Wegovi.

The U.K.

's health regulator approved a significantly higher dose of the drug for patients with a body mass index of at least 30.

The Danish drugmaker is awaiting regulatory approvals for the same size dose in the U.S.

and the EU.

Meanwhile, sales of Novo's Wegovi pill just began in the U.S.,

Data released Friday showed the new pill generated more than 4,000 new prescriptions in the U.S.

last week.

A strong start, analysts said.

Novo's American depository receipts jumped 9% Friday and closed up 6% for the week.

AI is causing investor angst over the outlook for some major software companies.

Intuit, the maker of TurboTax, Salesforce, a corporate software titan, and Adobe, which makes Photoshop and Acrobat, were all among the worst performers in the S&P 500 this week.

None of the companies reported specific bad news, but analysts say rapid advancements in AI are creating a general sense of unease around software companies that were once thought to be invincible thanks to the widespread adoption of their products.

AI is becoming very adept at coding software.

Some investors now picture a future in which companies can use AI to handle tasks once outsourced to enterprise software or simply build their own.

For the week, Intuit shares fell 16%.

Salesforce was 13% lower, while Adobe dropped 11%.

The world's biggest investment firm keeps getting bigger.

BlackRock reported a record $14 trillion in assets under management on Thursday, and investors were pleased with fee growth that beat expectations.

BlackRock primarily makes money through fees it charges to manage trillions of dollars for clients.