Argentina MSCI ruling kept the country in the lowest market tier, deferring close to a billion dollars of foreign buying and sending bank stocks tumbling.

LatAm Pre-Open: Argentina's banks crashed up to 9% after it missed an MSCI upgrade, while Brazil rebounded and US tech sank on Google's legal blow

Argentina MSCI ruling kept the country in the lowest market tier, deferring close to a billion dollars of foreign buying and sending bank stocks tumbling.