Why Do Winning Strategies Stop Winning?

You've probably heard about sophisticated trading strategies that seemed to beat the market: Momentum Investing, Contrarian Plays, Complex Algorithms. But these strategies often have a critical downside.
DISCLOSURES:
The information presented in this video is for informational purposes only and does not constitute investment advice, an offer, or a solicitation to buy or sell any financial products or services. Investing involves risks, including the potential loss of principal. The academic research discussed here reflects historical findings and may not guarantee future outcomes.
The "factors" described are based on historical relationships identified in research and do not assure positive investment returns or mitigate losses. Index Fund Advisors, Inc. adheres to an evidence-based investment philosophy and encourages viewers to consult with licensed financial professionals before making investment decisions.