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Investors could be forgiven for having whiplash after the events of the past week.
What's happening: Following the worst week for US stocks since the 2008 financial crisis, the S&P 500 kicked off March with a massive 4.6% rally, the index's largest one-day percentage gain since December 2018. Investors are piling back into risky assets on hopes that the world's central banks and other policymakers will step in to limit the economic and financial damage caused by the novel coronavirus outbreak.