Wall Street opened the week under pressure as rising oil prices, climbing Treasury yields and renewed geopolitical tensions weighed on equities, while a series of corporate developments — from a record Nvidia buyback to a high-profile CEO departure — reshaped trading across the stock and crypto markets.

Nvidia Announces Largest Buyback Authorization by a U.S. Company

Nvidia said it has increased its share-repurchase authorization by $150 billion, the largest buyback authorization ever announced by a U.S. company. Shares rose nearly 2% on the news and have gained more than 20% so far this year.

The expanded program gives the chipmaker additional room to return cash to shareholders, backed by the strong cash flow it continues to generate from AI chip sales. An authorization of this kind permits — but does not obligate — a company to repurchase shares over time, a mechanism cash-rich technology firms have increasingly used to return capital. Notably, the announcement came even as Nvidia trades at one of its lowest earnings multiples in over a decade.

Broader Market Falls on Oil and U.S.-Iran Tensions

The wider stock market moved in the opposite direction. The S&P 500, Nasdaq and Dow all declined.

Oil prices climbed after President Donald Trump rejected an Iranian proposal aimed at ending the conflict between the two countries. Higher oil prices can stoke inflation concerns, while rising Treasury yields make high-valuation growth stocks less attractive relative to bonds. With both pressures building at once, the path of oil and yields is the key input traders will look to for direction into upcoming sessions.

MongoDB CEO Departs for Meta

MongoDB was among the day's major movers after CEO Chirantan "CJ" Desai stepped down to join Meta Platforms. Desai will lead a new Meta business focused on bringing the company's artificial intelligence technology to enterprise customers.

The move expands Meta's AI strategy beyond consumer products and into enterprise software, a market where major technology platforms are racing to sell AI tools to corporate clients. CEO transitions are among the most closely watched events for software companies, given how leadership continuity shapes product roadmaps and customer relationships. MongoDB shares fell sharply on the news.

SpaceX Starship Reaches Orbit for the First Time

SpaceX notched a milestone as its Starship rocket entered orbit for the first time during its 14th test flight. The spacecraft deployed next-generation Starlink satellites before the mission ended early due to an engine issue. SpaceX runs Starship as an iterative test program, with each flight feeding performance data into subsequent designs.

Citi Taps Coinbase for Stablecoin Payments

Traditional finance and crypto continued to converge. Citigroup has reportedly tapped Coinbase to help large corporate clients accept stablecoin payments — digital tokens pegged to traditional currencies such as the U.S. dollar that have become a common vehicle for moving money on blockchain rails.

The arrangement builds on an existing relationship: Citi and Coinbase had already announced plans to develop digital-asset payment services for institutional clients.

Bitcoin Falls to $83K Despite Strong ETF Inflows

Cryptocurrency prices moved lower alongside stocks. Bitcoin fell around 1.7% toward $83,000 as oil prices climbed and investors reduced exposure to riskier assets. The broader CoinDesk 100 index dropped roughly 2.6%, reflecting weakness across other cryptocurrencies.

The decline came despite strong institutional demand last week. U.S. spot Bitcoin ETFs attracted about $2.4 billion in inflows, while Ether ETFs recorded approximately $690 million. Because spot ETFs hold the underlying assets directly, those flows offer a direct read on institutional allocation — and their divergence from the day's price action highlights how macro conditions, not just crypto-specific demand, are shaping near-term moves.

Markets are now weighing AI spending, corporate buybacks and crypto ETF demand against higher oil prices, elevated yields and geopolitical uncertainty.

This article was originally published on CoinCentral: Today's Top Stories: Nvidia's $150B Buyback, MongoDB Plunges and Bitcoin Falls to $83K