Microsoft's stock closed up 15.5% on Thursday, adding ~$450B to its market capitalization, the largest single-day market value increase in stock market history (Subrat Patnaik/Bloomberg)

<a href="https://www.bloomberg.com/news/articles/2026-07-30/microsoft-eyes-history-with-490-billion-pop-in-market-value?accessToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb3VyY2UiOiJTdWJzY3JpYmVyR2lmdGVkQXJ0aWNsZSIsImlhdCI6MTc4NTQzMTU5NiwiZXhwIjoxNzg2MDM2Mzk2LCJhcnRpY2xlSWQiOiJUSVpRSFdUOU5KTFMwMCIsImJjb25uZWN0SWQiOiIxMkE1QzVFRUNERDg0NUJEQjVFOTM1MUE0Mzk4QTAxNCJ9.UcfZVlhhNWxtm9btMC_oHL6ppDj2-zutwfHlErfaJSc"><img align="RIGHT" border="0" hspace="4" src="http://www.techmeme.com/260730/i64.jpg" vspace="4" /></a> <p><a href="https://www.techmeme.com/260730/p64#a260730p64" title="Techmeme permalink"><img height="12" src="http://www.techmeme.com/img/pml.png" style="border: none; padding: 0; margin: 0;" width="11" /></a> Subrat Patnaik / <a href="https://www.bloomberg.com/">Bloomberg</a>:<br /> <span style="font-size: 1.3em;"><b><a href="https://www.bloomberg.com/news/articles/2026-07-30/microsoft-eyes-history-with-490-billion-pop-in-market-value?accessToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb3VyY2UiOiJTdWJzY3JpYmVyR2lmdGVkQXJ0aWNsZSIsImlhdCI6MTc4NTQzMTU5NiwiZXhwIjoxNzg2MDM2Mzk2LCJhcnRpY2xlSWQiOiJUSVpRSFdUOU5KTFMwMCIsImJjb25uZWN0SWQiOiIxMkE1QzVFRUNERDg0NUJEQjVFOTM1MUE0Mzk4QTAxNCJ9.UcfZVlhhNWxtm9btMC_oHL6ppDj2-zutwfHlErfaJSc">Microsoft's stock closed up 15.5% on Thursday, adding ~$450B to its market capitalization, the largest single-day market value increase in stock market history</a></b></span>&nbsp; &mdash;&nbsp; Microsoft Corp. made market history on Thursday, adding nearly half a trillion dollars to its value, the most by any stock in a single day.</p>