By Dan Weil Ark Innovation ETF has plunged 58% so far this year, and is down 75% from its February 2021 peak. As technology stocks have dropped in recent months, pushing down the values of hotshot investor Cathie Wood’s Ark exchange-traded funds, she has defended herself by noting that she has a five-year investment horizon. And the five-year track record of her flagship fund Ark Innovation ETF (ARKK) – Get ARK Innovation ETF Report could indeed give investors comfort. The fund’s five-year return beat that of the S&P 500. But this changed as of Monday. The five-year annualized return of Ark In…