Cathie Wood is on a roll -- again. Sure, her Ark Invest exchange-traded funds (ETFs) underperformed for a while. So far this year, though, all six of those ETFs have soared by at least 20%. Half of them are up more than 40%.

Wood appears to be onto something with some of the trades she's made recently in the Ark Genomic Revolution ETF (NYSEMKT: ARKG) and Ark Innovation ETF (NYSEMKT: ARKK). Here's the secret behind her latest moneymaking strategy.

You could accurately say that Wood is swinging for the fences with some of her ETF investments. In particular, she has poured a lot of money into gene-editing stocks. 

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Source Fool.com