By Dan Weil That loyalty comes in the face of a 56% skid year to date for Wood’s flagship Ark Innovation ETF. Investors sure do love their “Mamma Cathie,” “Aunt Cathie,” or as hotshot investor Cathie Wood is nicknamed in South Korea, “Money Tree.” Even as her flagship Ark Innovation ETF (ARKK) – Get ARK Innovation ETF Report plunges, the fund’s investors are sticking along for the ride. Short interest (the number of shares held short) in the $7.8 billion fund has dropped to 9.2% of shares outstanding, down from an April peak of 17%, according to IHS Markit, as cited by Bloomberg. The fund has …