Communications services companies were lower as an outage hit one company.

Workplace messaging platform Slack suffered a widespread service disruption early Monday, as many employees returned to work for their first full workday of the year.

Meanwhile, ViacomCBS said Monday it has reached a distribution agreement with Walt Disney's Hulu that puts many of its most popular cable channels on the live-television video-streaming service. Financial terms of the multiyear agreement weren't disclosed.

Quibi is in advanced talks to sell its content catalog to Roku, WSJ reported, as the short-form streaming service winds down its operations following an unsuccessful run.

Shares in China's three large telecom carriers were roiled Monday, after the New York Stock Exchange moved to delist the trio to comply with a U.S. government ban.

Hong Kong-listed shares in all three dipped sharply in the first trading session since the NYSE move was announced, before reversing course later in the day.

Write to Amy Pessetto at amy.pessetto@dowjones.com

(END) Dow Jones Newswires

01-04-21 1712ET