Stocks fall for second-straight week on Russia-Ukraine tensions, Producer Price Index leaps 9.7% higher, Retail Sales rise 3.8%, FOMC minutes are released, Nvidia reports Q4 earnings with revenue rising 52%, Walmart reports Q4 earnings and beats estimates, Applied Materials releases Q1 earnings and grows sales by 21%, Deere & Company Reports Q1 earnings and tops forecasts, Airbnb reports Q4 earnings showing revenue grew by 78%, St. Louis Fed President James Bullard comments on inflation.