Jim Cramer reviews some of the 'terrifying' ups and downs of earnings season
1. Nvidia's stock surged after U.S. allows chip sales in China. 2. BlackRock experienced a mixed quarter, with lower net inflows. 3. Wells Fargo cut guidance for net interest income despite earlier optimism. 4. Cramer believes BlackRock and Wells Fargo will recover but not immediately. 5. Earnings season reveals volatility and unpredictability in stock valuations.