Biden’s 2021 tax agenda and the early Build Back Better drafts did include significant proposed increases in capital gains taxes for high‑income investors (e.g., raising the top rate from 20% to 25%, aligned with a higher 39.6% ordinary rate).(roselawgroupreporter.com) However, these capital‑gains hikes were stripped out in later negotiations and never enacted; the House‑passed and final Inflation Reduction Act omitted the capital‑gains rate increase.(www2.dugganbertsch.com) As of the 2025 tax year, federal long‑term capital gains are still taxed at 0%, 15%, and 20% (plus the unchanged 3.8% NIIT for high earners), with only the income thresholds indexed for inflation.(kiplinger.com)

On the corporate side, Biden’s American Jobs Plan originally proposed raising the federal corporate rate from 21% to 28%.(taxfoundation.org) But Congress never enacted any increase: subsequent Build Back Better drafts dropped the corporate rate hike, and later tax laws left the 21% statutory corporate rate from the 2017 Tax Cuts and Jobs Act in place.(www2.dugganbertsch.com)

So Chamath was correct that there was insufficient support to pass the large capital‑gains increase, but incorrect that the corporate rate would “probably go to 25%” – it stayed at 21%. Because the normalized prediction conjunctively asserts both outcomes (no big cap‑gains hike and a corporate rate around 25%), the overall prediction is best scored as wrong, albeit for a mix of one accurate and one inaccurate component.