NEW YORK—An economic slowdown in China could ripple through the global economy and weigh on commodity prices and growth, star stock picker Cathie Wood of ARK Invest warned in a webinar on Tuesday.Wood, whose flagship $19.7 billion Ark Innovation fund was the top-performing U.S. equity fund in 2020, said that China’s recent steps to crack down on sectors ranging from gaming to education to financial firms are increasing the likelihood of a policy mistake that leads to a sharp slowdown.“I really do think that the policy makers in China are beginning to play with fire,” she said, adding “We will...