Superstar investor Cathie Wood doesn't flinch when she sees a declining stock price. In fact, Wood keeps her cool and often invests in struggling stocks -- as long as the particular company has a compelling long-term story. The result? Wood's ARK Invest has collected shares of some of the world's most innovative companies. Its flagship ARK Innovation ETF is greatly outperforming the S 500 index this year, with a 29% gain versus the S 500's 13% increase.

In recent days, Wood was at it again -- picking up a stock not only as it dropped, but also as the company reported a billion-dollar quarterly loss. This stock had already been on the decline before the report. I'm talking about coronavirus vaccine maker (NASDAQ: MRNA), now heading for a 60% drop this year.

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Source Fool.com