By Dan Weil ‘Innovation tends to gain traction during difficult times because it solves problems,’ the prominent asset manager Cathie Wood says in a webinar. The stock market has left a trail of tears this year, especially over the past week, with the S&P 500 falling into a bear market. The celebrated investor Cathie Wood has seen her Ark Investment Management exchange-traded funds tumble, as their disruptive technology stocks have been hammered by roaring inflation and soaring interest rates. She remains committed to her strategy. If Wood had known a year ago about the coming war in Ukraine a…