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Her funds often move in and out of positions within just days.That’s what she just did, selling shares of a popular tech stock just days after buying in.Wood’s funds have experienced a volatile ride this year, swinging from sharp losses to strong gains.In January and February, the Ark funds rallied as investors bet on the Trump administration's potential deregulation that could benefit Wood’s tech bets.Related: Stock market hits record as Fed interest rate cut bets shiftBut the momentum faded in March and April, with the funds trailing the market as top holdings — especially Tesla, Wood’s biggest position — slid amid growing concerns over the macroeconomy and trade policies.Now, the Ark funds are making a strong comeback. As of Aug. 25, the flagship Ark Innovation ETF (ARKK) is up 31.7% year-to-date, far outpacing the S&P 500’s 9.7% gain.Wood's remarkable return of 153% in 2020 helped build her reputation and attract loyal investors. Her strategy can lead to sharp gains during bull markets but also painful losses, like in 2022, when ARKK dropped more than 60%.Those swings have weighed on her long-term results. As of Aug. 22, the Ark Innovation ETF has delivered a five-year annualized return of negative 2.7%, while the S&P 500 has an annualized return of 15.5% over the same period.Over the past 12 months through Aug. 21, the Ark Innovation ETF saw $1.6 billion in net outflows, according to data from ETF research firm VettaFi.Image source: Fallon/AFP via Getty ImagesWood’s investment strategy is straightforward: Her Ark ETFs typically buy shares in emerging high-tech companies in fields such as artificial intelligence, blockchain, biomedical technology, and robotics.She says these companies have the potential to reshape industries, but their volatility leads to major fluctuations in Ark funds' values.Related: Cathie Wood's net worth: The Ark Invest CEO's wealth & incomeOver the 10 years ending in 2024, the Ark Innovation ETF wiped out $7 billion in investor wealth, according to an analysis by Morningstar’s analyst Amy Arnott. That made it the third-biggest wealth destroyer among mutual funds and ETFs in Arnott’s ranking.Still, Wood has been bullish on the market. In a letter to investors published in late April, she dismissed predictions of a recession dragging into 2026 and struck an optimistic tone for tech stocks."During the current turbulent transition in the U.S., we think consumers and businesses are likely to accelerate the shift to technologically enabled innovation platforms including artificial intelligence, robotics, energy storage, blockchain technology, and multiomics sequencing," she said.Terms and Privacy PolicyPrivacy & Cookie SettingsMore InfoS&P 5006,481.40 +15.46 (+0.24%)Dow 3045,565.23 +147.16 (+0.32%)Nasdaq21,590.14 +45.87 (+0.21%)Russell 20002,373.80 +15.20 (+0.64%)VIX14.85 +0.23 (+1.57%)Gold3,449.50 +0.90 (+0.03%)PortfolioSign in to access your portfolioSign inTop gainersMDB MongoDB, Inc. 295.70 +81.36 (+37.96%)SATS EchoStar Corporation 58.76 +7.89 (+15.51%)NCNO nCino, Inc. 32.69 +4.00 (+13.94%)LUMN Lumen Technologies, Inc. 5.27 +0.58 (+12.37%)PCT PureCycle Technologies, Inc. 14.86 +1.26 (+9.26%)Top losersTIGR UP Fintech Holding Limited 11.57 -1.25 (-9.75%)NEGG Newegg Commerce, Inc. 60.89 -6.14 (-9.16%)LI Li Auto Inc. 22.60 -2.05 (-8.32%)KNF Knife River Corporation 82.76 -7.39 (-8.20%)SMMT Summit Therapeutics Inc. 24.81 -2.17 (-8.06%)Most activeWBA Walgreens Boots Alliance, Inc. 11.98 +0.06 (+0.50%)OPEN Opendoor Technologies Inc. 4.0200 -0.6800 (-14.47%)NVDA NVIDIA Corporation 181.60 -0.17 (-0.09%)PSNYW Polestar Automotive Holding UK PLC 0.4700 +0.3100 (+193.75%)NIO NIO Inc. 6.34 -0.36 (-5.37%)Earnings eventsMy earnings eventsEarnings eventsTrending tickersNVDA NVIDIA Corporation 181.60 -0.17 (-0.09%)CRWD CrowdStrike Holdings, Inc. 422.61 +5.01 (+1.20%)SNOW Snowflake Inc. 200.39 +6.04 (+3.11%)LUMN Lumen Technologies, Inc. 5.27 +0.58 (+12.37%)CRWV CoreWeave, Inc. 96.93 +5.54 (+6.06%)Top economic eventsPowered by Money.com - Yahoo may earn commission from the links above.