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What is evidence-based investing?
Nobody can establish who first used the phrase 'evidence-based investing', and no regulator defines it. Robin Powell, who was given the name by Larry Swedroe in 2015 and is sometimes wrongly credited with coining it, sets out what it actually means: four tests of what counts as evidence, borrowed from a medical parallel that hit the same crisis twelve years ago. Including where he goes further than a global tracker, and why he holds that position less firmly than he used to.
Robin Powell
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Optimism as a business model: Why investment consultants can't afford to recommend simplicity
nvestment consultants have systematically raised their return assumptions for alternative assets since 2001 — not because performance improved, but because complexity generates fees. New research from Stanford and Harvard reveals how consultant optimism drives billions in pension allocations, despite mounting evidence that simple, low-cost indexed strategies often outperform alternatives-heavy portfolios. The entire boom may be built on structural conflicts rather than superi
Robin Powell
Oct 28, 202514 min read
Does Warren Buffett beat the market? The statistical truth behind the Oracle's record
Warren Buffett built his fortune through active investing, yet tells his family to put 90% in index funds. Why? His 44-year record reveals the answer: from 1981-2002, he achieved statistically significant alpha. But from 2003-2024, his performance became indistinguishable from luck. Academic analysis shows even his early success was systematic factor exposure plus cheap leverage, not stock-picking magic. If Buffett couldn't sustain alpha in mature markets, your fund manager w
Robin Powell
Oct 18, 202515 min read
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