David Kotok co-founded Cumberland Advisors in 1973 and has been its Chief Investment Officer since inception. David’s articles and financial market commentaries have appeared in the New York Times, the Wall Street Journal, Barron’s, and other publications. He is a frequent contributor to Bloomberg TV and Bloomberg Radio, Yahoo Finance TV, and other media. He has authored or co-authored four books, including the second edition of "From Bear to Bull with ETFs" ... (login for more professional bio)