Markets fell sharply last week, especially in crypto, and on Monday there was at least a brief reversal of sentiment as investors were buoyed by Amazon's announcement that it would invest up to $50 billion in the US government's plans to expand its artificial intelligence and supercomputing infrastructure. The news pushed the Nasdaq up 2.3% and the S & P 500 up 1.4% at midday EST. Risk appetite also spread to the crypto market, with bitcoin prices recovering to $87,300 after falling below $80,00...