British Airways' weekend flight fiasco weighs on stock; AutoZone upgraded; Payment processors connect

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

Shares of British Airways’ (IAG.L) parent fell in London trading after a computer outage left 75,000 passengers stranded over the holiday weekend. BA said a power surge knocked out computer systems, call centers and its website. The airline expects to resume a full schedule of flights from Heathrow and Gatwick airports today. We’ll have more on this story in a few minutes.

AutoZone (AZO) was upgraded by Goldman Sachs to buy from neutral. The investment firm believes the auto parts maker is well managed and believes it will bounce back from the recent sector-wide slowdown as sales and earnings growth return.

Zynga (ZNGA) shares were higher after Piper Jaffray upgraded the stock to overweight from neutral. The analysts believe that the mobile gamemaker’s focus on live services and containment of costs by promoting existing games instead of releasing new mega-hits lowers the company’s risk profile.

CardConnect (CCN) stock soared in early trading. First Data (FDC) is buying the rival payment-processing technology firm for $750 million in cash and debt. That translates to about $15 a share, about a 10% premium based on CardConnect’s closing price on Friday.