Avie Schneider

A new Apple Watch and software with advanced heart-monitoring capabilities could boost the detection of abnormal heartbeats in millions of people, but it could also raise the chance of false positives, a cardiologist and researcher says.

Apple unveiled three new iPhones, including two with bigger displays, but perhaps the more dramatic announcement from Cupertino, Calif., on Wednesday was its new Apple Watch, with the new health-related tools.

Updated at 6:29 p.m. ET

Twitter on Thursday said it has "permanently suspended" conspiracy theorist Alex Jones and his InfoWars outlet, citing "new reports of Tweets and videos posted yesterday that violate our abusive behavior policy."

Last month, YouTube, Apple, Facebook and Spotify banned Jones' main platforms over concerns about his content. But Twitter only suspended some of his privileges, a move that drew criticism.

Tesla Motors started selling its stock to the public in 2010 — the first initial public offering of a U.S. automaker in more than a half-century. On Tuesday, Tesla CEO Elon Musk said he's considering a reversal — taking the electric car company private.

As he often does, the outspoken entrepreneur took to Twitter to deliver the news. "Am considering taking Tesla private at $420. Funding secured," Musk tweeted in early afternoon.

Updated at 9:08 a.m. ET

The economy continued to add jobs at a steady pace last month, and the unemployment rate remained low. Analysts have been looking for signs that wage growth might pick up, but it held steady, too.

Payrolls grew by a lower-than-expected 157,000 in July, and the unemployment rate edged down to 3.9 percent, as projected, the Labor Department said Friday.

Updated at 3:19 p.m. ET

The Federal Reserve got a rare piece of advice from the president Thursday. The central bank is an independent agency and presidents usually don't comment directly on Fed policy.

The days of plastic straws are drawing shorter.

Marriott International on Wednesday became the latest big company to announce it will stop using plastic straws, saying it would remove them from its more than 6,500 properties by next July. The giant hotel chain said it will stop offering plastic stirrers, too.

Updated at 5:02 p.m. ET

The power plays for Hollywood's biggest studios are coming fast and furious.

Comcast on Wednesday made a $65 billion offer for some of the biggest Hollywood holdings of 21st Century Fox, the global television and entertainment conglomerate controlled by Rupert Murdoch and his family. The deal would not include Fox News.

Updated at 4:55 p.m. ET

The stock market went on a wild ride again on Monday, with the Dow Jones industrial average closing down 1,175 points, its worst point drop in history. The Dow closed down 4.6 percent and turned negative for the year.

At one point Monday afternoon, the Dow was down 1,579 points — the largest intraday point drop in the history of the index.