Best Buy raised its profit and sales expectations ahead of the holiday shopping ramp-up on Black Friday after a strong third quarter.

Comparable-store sales at the nation's largest consumer electronics chain rose 2.7 percent, fueled by computing, gaming and mobile phones. It was the biggest gain in three years for the Minnesota retailer.

Shares rose nearly 3 percent before the opening bell Tuesday.

The strong quarter is an encouraging sign for Best Buy, which like almost all U.S. companies, has spent months navigating an uncertain economic environment as President Donald Trump imposes wide-ranging tariffs on imports. Electronics have been particularly hard hit.

Consumer sentiment has sagged and the just ended 43-day federal shutdown did not help.

Shoppers seemingly continue to spend,

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