Leslie N. Masonson is a highly accomplished market veteran in the financial markets, serving as a financial advisor, author, ETF columnist, educator, and active trader in ETFs and futures. He has over 50 years of experience in researching, backtesting, investing, and trading stock ETF strategies using technical indicators and relative strength analysis.
Since the infancy of ETFs in the late 1990s and early 2000s, Mr. Masonson has been actively engaged in recognizing their value as investment vehicles. He has dedicated countless hours to developing ETF trading strategies, writing articles, and participating in interviews about ETFs.
Les has written eight authoritative books on day trading, market timing, ETF relative strength, ETF rotation investing, and corporate cash management. His notable works on the stock market include: Profiting from ETF Rotation Strategies in Turbulent Markets (2011) and The QQQ & TQQQ ETF Profit Machine: A Roadmap for Trading and Investing in Cutting-Edge AI-Focused Tech Titans (2025).