By Luc Olinga The two tech groups lost tens of billions of dollars in a week and it may not be over. Facebook (META) – Get Meta Platforms Inc. Report and Nvidia (NVDA) – Get NVIDIA Corporation Report, two of the flagships of tech, seem to be going through a real ordeal. Both companies lost tens of billions of dollars in market cap during the trading week ending September 16. The repercussions are enormous for these two companies which have just been ejected from the top 10 most valued companies in the world. The network giant Facebook, which is now called Meta Platforms, is only a shadow of wh…