CNBC Daily Open: Dow drops, Nvidia can't save Nasdaq

This report is from today's CNBC Daily Open, our international markets newsletter. CNBC Daily Open brings investors up to speed on everything they need to know, no matter where they are. Like what you see? You can subscribe  here .

Treasury yields weigh on Wall Street
The S&P 500 snapped its three-day winning streak as Treasury yields climbed. Despite Nvidia's continued rise since its earnings report last week, the tech giant couldn't prevent the Nasdaq Composite from falling. The Dow Jones Industrial Average also declined, shedding 400 points, with insurer UnitedHealth leading losses. The yield on the 10-year Treasury note rose for a second consecutive day following a lackluster auction of government bonds on Tuesday. Rising yields can dampen consumer spending and make Treasurys and money market funds more appealing than stocks. Oil prices also slipped. 

Salesforce plunges
Shares of Salesforce slumped more than 17%in extended trade after the cloud software company reported weaker-than-expected revenue and issued earnings and revenue guidance that missed analysts' expectations for the current quarter.  

Peltz dumps Disney stake
Activist investor Nelson Peltz has sold his entire stake in Disney, according to a person familiar with the matter. In early April, Peltz lost a proxy battle at Disney to elect himself and former Disney Chief Financial Officer Jay Rasulo to the company's board. Peltz had long taken issue with Disney's governance, particularly the company's streaming strategy and a failed succession plan for CEO Bob Iger. 

Bulking up on shale
ConocoPhillips agreed to buy Marathon Oil in an all-stock transaction worth $17.1 billion. The acquisition will add 2 billion barrels of resources to ConocoPhillips' portfolio,