Four different forces combined to create a big sell-off last week, and then a jagged but strong rebound this week. There's of course the spread of the coronavirus, COVID-19. There is the Democratic primary in the US and what it foretells for the Presidential election in November. There is the, ahem, healthy valuation of the stock market, poised at all-time highs before the 7-session sell-off. And there's the role of the Federal Reserve, both in setting interest rates and in providing liquidity to the markets. We try to break down what matters and what is transient here, while conceding that uncertainty is a big part of the overall outlook.Topics Covered