Goldman Sachs says investors are underestimating the chance of a COVID-19 vaccine in 2020, an event that could push the S&P 500 11% higher

· Goldman Sachs thinks markets are underpricing the prospect that at least one coronavirus vaccine will be developed and ready for use by the end of 2020.
· The US bank said in a note Wednesday that it its "upside scenario" is for the S&P 500 to rise 11% to 3,700 by year end in the event of a vaccine becoming available.
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