With information now ubiquitous, the primary source of market inefficiency is no longer informational but behavioral. The most durable edge is "time arbitrage"—exploiting the market's obsession with short-term results by focusing on a business's normalized potential over a two-to-four-year horizon.

Most of an index's returns come from a tiny fraction of its component stocks (e.g., 7% of the Russell 3000). The goal of indexing isn't just diversification; it's a strategy to ensure you own the unpredictable "tail-event" winners, like the next Amazon, that are nearly impossible to identify in advance.

Contrary to popular belief, the market may be getting less efficient. The dominance of indexing, quant funds, and multi-manager pods—all with short time horizons—creates dislocations. This leaves opportunities for long-term investors to buy valuable assets that are neglected because their path to value creation is uncertain.

Contrary to the belief that mega-cap stocks are efficiently priced, behemoths like Alphabet can see 100% price swings in a single year. This volatility creates massive opportunities for patient investors who ignore market noise and focus on fundamentals.

Historically, small-cap companies grew earnings faster than large-caps, earning a valuation premium. Since the pandemic, this has flipped. Large-caps have seen astronomical earnings growth while small-caps have lagged, creating a rare valuation discount and a potential mean reversion opportunity for investors.

The dominance of low-cost index funds means active managers cannot compete in liquid, efficient markets. Survival depends on creating strategies in areas Vanguard can't easily replicate, such as illiquid micro-caps, niche geographies, or complex sectors that require specialized data and analysis.

The S&P 600 small-cap index has massively outperformed the more popular Russell 2000. The key difference is the S&P 600's requirement for profitability, which screens out speculative, pre-revenue "junk" companies that drag down the Russell 2000's returns, especially during speculative bubbles.

The underperformance of active managers in the last decade wasn't just due to the rise of indexing. The historic run of a few mega-cap tech stocks created a market-cap-weighted index that was statistically almost impossible to beat without owning those specific names, leading to lower active share and alpha dispersion.

Contrary to belief, small-cap investing doesn't have to be excessively volatile. By focusing on quality and portfolio construction, a portfolio of ~80 small-cap names can achieve a historical volatility of 10-13%, less than half that of the Russell 2000 index (25-30%), while remaining fully invested.