Advanced Micro Devices (AMD) shares have declined more than 14% in the past week. The chipmaker's shares suffered heavy losses following a Bloomberg news that the U.S. government is reportedly planning to tighten restrictions on chip exports to China. The United States already prohibits the sale of high-end chips above a certain capability threshold in China.AMD shares declined 10.2% on Jul 17 on the heels of the Bloomberg report. It further declined by 2.3% to close at $155.77 on Jul 18. Year to date, AMD ...