5 Min Read NEW YORK (Reuters) - The steep slowdown in momentum stocks over the last week has been especially painful for ARK Invest’s Cathie Wood, the top stock picker of 2020. FILE PHOTO: Dividers are seen inside a trading post on the trading floor as preparations are made for the return to trading at the New York Stock Exchange (NYSE) in New York, U.S., May 22, 2020. REUTERS/Brendan McDermid/File Photo The $26.6 billion ARK Innovation ETF, which analysts say is beloved by retail investors, is down nearly 11% over the last week, nearly 10 times the slide in the benchmark S&P 500, as companies in its portfolio, like Tesla Inc, have stumbled. The fund has large positions in so-called momentum stocks, which tend to attract investors based on thematic trends rather than fundamentals or valuation.