AMD sinks; Fitbit soars; Starbucks raises prices

Here are some of the stocks the Yahoo Finance team is following for you today.

Advanced Micro Devices (AMD) shares are getting crushed this morning.  The chipmaker is warning second quarter revenue will fall 8%, much more than previously forecast.  In addition, AMD expects gross margin to come in below expectations.  The company blames a slowdown in PC sales.

Fitbit (FIT) shares are jumping in early trading. An RW Baird analyst initiated coverage on the exercise device company with a price target of $52.  That's almost a third higher than yesterday's closing price of $40.19. Shares of Fitbit are double their IPO price set back in December.

Syngenta (SYT) is also in focus. Monsanto (MON) CEO Hugh Grant tells a Swiss newspaper his firm might consider boosting its $45 billion bid for the agro-chemical company.  Syngenta has rebuffed Monsanto's unsolicited offer, calling it inadequate.

Advance Auto Parts (AAP) is on our watchlist. The car parts retailer is being added to the S&P 500 index.  It will replace Family Dollar Stores once its acquisition by Dollar Tree (DLTR) is completed.

Starbucks (SBUX) shares moving in early trading. You're paying a little bit more for your cup of Starbucks this morning.  A price hike of about 1% overall takes effect today.  That means the cost of a typical cup of joe will go up a dime...making the average price nationwide for a "Venti" $2.45.