Amazon’s stock was down 1.14 percent, bringing its market capitalization to $690.4 billion, while software maker Microsoft’s 1.83 percent fall depressed its market capitalization to $690.3 billion.
Bolstered by blockbuster quarterly results, Amazon’s stock gained 3.8 percent over the three sessions ended Tuesday, even as Wall Street struggled through a rout that has raised fears that a nine-year bull market may be ending.
Amazon’s market cap at points on Wednesday during intraday trade already topped that of Microsoft, but it has never closed at a higher value.
Amazon’s explosive growth in retail and cloud computing has sent its shares 77 percent higher over the past year, outpacing Microsoft’s 42 percent rise.
Apple Inc’s $819 billion market capitalization remains Wall Street’s largest, followed by Alphabet Inc, the parent of Google, at $736 billion.
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