The S&P 500's heavy concentration in a few tech giants is not unprecedented. Historically, stock market returns have always clustered around the dominant technology transformation of the time. Before 1980, leaders were spinoffs of Standard Oil, car companies like GM, and General Electric, reflecting the industrial and automotive revolutions.

Today's high S&P 500 valuation isn't a bubble. The market's composition has shifted from cyclical sectors (where high margins compress multiples) to mature tech (where high margins expand them). This structural change supports today's higher price-to-sales ratios, making the market fairly valued.

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 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.

While the S&P 500's price-to-earnings ratio is near dot-com bubble highs, the quality of its constituent companies has significantly improved. Current companies are more profitable and generate nearly three times more free cash flow than in 2000, providing some justification for today's rich valuations.

The current market is not a simple large-cap story. Since 2015, the S&P 100 has massively outperformed the S&P 500. Within that, the Magnificent 7 have doubled the performance of the other 93 stocks, indicating extreme market concentration rather than a broad-based rally in large companies.

Contrary to the belief that only a few mega-cap stocks drive market returns, a significant portion of S&P 500 companies—167 in the year of recording—outperform the index. This suggests that beating the market through stock picking is more attainable than commonly portrayed.

Large-cap tech earnings are hitting record highs, driving stock indices up. Simultaneously, core economic indicators for small businesses and high-yield borrowers show they have been in a recession-like state for over a year, creating a stark divergence.

Despite record market highs, the S&P 500's underlying earnings per share (EPS) have not yet recovered to their peak from early 2022. This "narrative violation" points to a hidden earnings recession for large-cap stocks, a fact that has been masked by market enthusiasm and multiple expansion.