National Business

TORONTO — Some of the most active companies traded Tuesday on the Toronto Stock Exchange: Toronto Stock Exchange (17,779.41, down 126.61 points.) BlackBerry Ltd. (TSX:BB). Technology. Up 86 cents, or 3.75 per cent, to $23.78 on 22 million shares.

Internet users across the northeast U.S. experienced widespread outages for several hours Tuesday, interrupting work and school because of an unspecified Verizon network issue.

A prospective COVID-19 vaccine touted as a made-in-Canada response has begun human clinical trials in Toronto, and the company says it's already preparing a followup that will target more infectious variants.

TORONTO — Canada's main stock index suffered its worst drop of the year Tuesday on a broad-based decline led by the energy and technology sectors. The S&P/TSX composite index closed down 126.61 points to 17,779.

TORONTO — Loblaw Companies Ltd. is winning praise from a coalition of environmental, health and labour groups for its commitment to stop using receipt paper that contains a potentially dangerous chemical.

NEW YORK — CBS has placed two top executives on administrative leave as it investigates charges of a hostile work environment for women and minorities at news operations in some of its largest individual stations.

ROME — Italian Premier Giuseppe Conte resigned Tuesday after a key coalition ally pulled his party’s support over Conte’s handling of the coronavirus pandemic, setting the stage for consultations this week to determine if he can form a third governme

SASKATOON — Canadian fertilizer giant Nutrien Ltd. says it will expand its use of a proximity alarm and contact tracing technology to help protect 14,500 of its employees from the COVID-19 pandemic.

TORONTO — After shares of BlackBerry and GameStop surged this week amid hype on social media, investors may be tempted to get in on the action, even if there is no company news driving the stocks higher.

MONTREAL — Against headwinds from a labour conflict and a mild cold and flu season, grocery and pharmacy retailer Metro Inc. posted higher first-quarter sales and profit on Tuesday compared with a year ago.