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Founder | Monopoly MOAT
Cupertino, CA, USA
Publications:
Hesham Mashhour is the independent researcher behind Monopoly MOAT (mplymoat.com), a publication covering monopoly and economic-moat ETFs (MPLY, MOAT, TOLL) and market concentration. He is the author of a preregistered study of 7,152 U.S. issuer-years testing whether durable market power predicts future fundamentals and stock returns, and the creator of free tools including a Market Concentration (HHI) Calculator. He provides data-driven commentary on ETF structure, moat investing claims, factor evidence, and corporate market power — with primary sources and methodology disclosed.
A free browser tool that answers "is this market dominated by a few companies?" in plain English — enter each company's market share and it computes concentration using current U.S. thresholds. No signup, runs entirely in the browser.
mplymoat.com
A permanent, continuously updated head-to-head guide comparing the leading monopoly and wide-moat ETFs on identical, dated fields — holdings, fees, selection process, risks — with primary-source links and no rankings or recommendations. The reference page for anyone covering this fund category.
mplymoat.com
A preregistered study of 7,152 U.S. issuer-years (2017–2025) testing whether durable market power characteristics predict future fundamentals and stock returns. Built from SEC filing data with frozen, outcome-blind methodology — the headline result is a null finding that challenges popular "moat investing" claims.
mplymoat.com