Intel buys Altera; Bristol-Meyers drug combo promising; Microsoft Windows 10 date

Here’s a look at some of the stocks the Yahoo Finance team will be watching for you today.

Altera (ALTR) shares are soaring in early trading.  It's official. Intel (INTC) is buying its smaller rival for about $16.7 billion in cash, or $54 a share, putting an end to the two month takeover drama.  Shares of Intel are also on the move on the news.

We are also keeping an eye on drugmakers this morning as news trickles out from the American Society of Clinical Oncology annual conference in Chicago.

Bristol-Meyers Squibb (BMY) shares are higher in early trading after clinical trials showed that combining two of the Bristol-Meyers' immune-boosting medicines kept skin cancer from progressing longer than using either drug alone.  However, the level of side effects also increased, raising concerns about the drug combo's safety.

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Microsoft (MSFT) shares also grabbing headlines. The tech giant announced it will release its new Windows 10 operating system on July 29th. Microsoft will offer free upgrades for users with Windows 7 and Windows 8.1.

Visa (V) and MasterCard (MA) are in focus this morning. Starting today foreign credit card companies will be allowed to process domestic Chinese payments, tapping into the $73 trillion market, which was dominated by China's state-backed UnionPay.