Investors always are confronted with uncertainties. Not least of which, the direction of market prices is uncertain each day. At certain times, however, uncertainties over important fundamentals can reach levels that trigger outsized market responses. Such was the case on August 5 when a convergence of fundamental uncertainties prompted a 962 point swing in the Dow Jones Industrial Average and a one-day loss of approximately –3% in global stock prices. High on the list of uncertainties were the outlook for economic growth, the direction of monetary policy and the heightened level of trade tensions. A review of these important fundamentals can provide perspective and investment implications.