Despite the common focus on bottom-up fundamental analysis, statistical evidence shows two-thirds of an investment manager's relative performance is determined by macro factors, such as whether growth or value stocks are in favor. Ignoring top-down signals like Fed policy is a significant mistake, as it means overlooking the largest driver of returns.

While a pension fund's ultimate goal is hitting its absolute actuarial return, this is irrelevant for short-term evaluation. In the short run, performance must be judged relative to peers or benchmarks to account for the prevailing market environment.

While equal-weighting avoids concentration risk, it's not a perfect solution. When applied to an index like the S&P 500, it still only includes companies that have already grown large enough to qualify, inheriting a bias towards higher-multiple stocks and excluding deep value opportunities.

Many factor ETFs are 'closet indexers' that only slightly tilt a benchmark. A purer, academic approach builds concentrated portfolios (e.g., top 10% on momentum), creating high active share and true differentiation. This method risks severe, prolonged deviation from benchmarks, making it suitable only for investors with very long time horizons.

Market-cap-weighted indexes create a perverse momentum loop. As a stock's price rises, its weight in the index increases, forcing new passive capital to buy more of it at inflated prices. This mechanism is the structural opposite of a value-oriented 'buy low, sell high' discipline.

The performance gap between market-cap and equal-weight strategies is not random; it's cyclical and can last for over a decade. While market-cap has dominated recently (winning 8 of the last 11 years), this was preceded by a period where equal-weight won for 13 of the prior 15 years. Recognizing these long cycles is crucial for strategic allocation.

When markets are top-heavy and expensive, like in 2000, the concentration risk of market-cap weighting is severe. In the 13 years after the dot-com peak, while the S&P 500 went nowhere, its equal-weighted version doubled, highlighting a powerful de-risking strategy.

Market efficiency increases with company size and liquidity. Therefore, the excess returns (alpha) from investment factors like value are significantly larger in the inefficient micro-cap space. For large-caps, the market is so efficient that factor premiums are minimal, making low-cost indexing a superior strategy.

Market cap indexing acts like a basic trend-following system by buying more of what's rising. However, its Achilles' heel is the lack of a valuation anchor, causing investors to over-concentrate in expensive assets at market peaks. In high-valuation environments, almost any other weighting method, like equal-weight or value, is likely to outperform over the long term.