Walmart's market cap surpassed $1 trillion on Tuesday, putting the largest U.S. retail chain in an exclusive club dominated by tech groups. Bloomberg adds: The Bentonville, Arkansas-based chain -- a longtime favorite of bargain-hunting consumers -- has flexed its massive scale and supplier network to keep prices low and grab market share across the income spectrum. While Walmart has maintained its appeal to households looking for value, its online offerings are drawing new, wealthier shoppers seeking convenience.

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