Warren Buffett famously stated that it's smart to "be fearful when others are greedy and be greedy when others are fearful." Cathie Wood stands out as a great example of an investor heeding the latter part of Buffett's advice.

All of Wood's ARK Invest exchange-traded funds (ETFs) are down significantly this year. Her flagship ARK Innovation ETF (NYSEMKT: ARKK) has plunged more than 55%. But she's not afraid to invest even more heavily. Wood is loading up on these three stocks. Should you?

Last week, Wood's ARK Genomic Revolution ETF (NYSEMKT: ARKG) bought over 2 million shares of Ginkgo Bioworks (NYSE: DNA). Those purchases followed a significant amount of buying earlier in September and in previous months. 

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Source Fool.com