What happened
Nvidia said it is adding $150 billion to its existing stock buyback plan. The company will repurchase more of its own shares with cash. This could reduce shares outstanding and support earnings per share.
Separately, there is a tax angle about selling Nvidia stock inside an IRA versus withdrawing cash. Selling shares inside a traditional IRA does not trigger current capital gains tax because taxes are deferred. If you withdraw money from the IRA, that cash is treated as ordinary income. That income can raise the amount of your Social Security benefits that are taxed, depending on your overall income.
Why it matters
A bigger buyback shows Nvidia’s preference for returning cash to shareholders and can influence the stock’s price and per-share metrics. For people with IRAs, the tax detail matters: what you do inside the account (selling shares) is taxed differently than money you take out. Withdrawals can push more of Social Security into taxation, which affects take-home income for some retirees.