Cathie Wood’s investment strategy is simple: Her ARK ETFs typically buy shares in emerging, high-tech companies in fields such as artificial intelligence, blockchain, DNA sequencing, energy storage, and robotics. Wood believes these companies will transform industries, but their volatility causes significant swings in ARK funds' values.

Ark Invest's focus on owning innovative and disruptive businesses has made its founder and CEO Cathie Wood a closely followed investment professional. Someone looking to put some money into the stock market might follow her trading moves to find potential investment ideas.

Cathie Wood’s ARK Invest bought more shares in Archer Aviation showing its bullish stance on the drone company. Collectively, the funds acquired more than five million shares worth $36 million, about 1% of the stock’s total market value.

Wood says these companies will transform industries, but their volatility causes significant swings in Ark funds' values. Related: Cathie Wood buys $22.1 million of battered tech

Cathie Wood loads up on drone maker Archer Aviation amid price hikes, defense partnership. Ark Invest offloaded some Tesla stock.