Cisco's stock took 25 years to reclaim its year-2000 peak, despite the underlying business growing significantly. This serves as a stark reminder that even a successful, growing company can deliver zero returns for decades if an investor buys in at an extremely high, bubble-era valuation.

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.

While Buffett's 22% annual returns are impressive, his fortune is primarily a result of starting at age 11 and continuing into his 90s. Had he followed a typical career timeline (age 25 to 65), his net worth would be millions, not billions, demonstrating that time is the most powerful force in compounding.

Earning a high return on invested capital is only half the battle. True compounding requires the ability to redeploy large amounts of capital at similarly high rates. Amphenol achieves this through its disciplined M&A playbook in a fragmented market, answering the crucial question of reinvestment.

For high earners, strategic tax mitigation is a primary wealth-building tool, not just a way to save money. The capital saved from taxes represents a guaranteed, passive investment return. This reframes tax planning from a compliance chore to a core financial growth strategy.

The paper wealth generated on IPO day is a misleading metric due to lockup periods and market volatility. A more accurate mental model for an investor's actual return is the company's market capitalization 18 months after the public offering. This timeframe provides a truer 'locked in value' after initial hype and selling pressure subsides.

TA's compensation structure aligns partner incentives directly with investor returns. The primary way for partners to increase their ownership (carry) is by generating realized gains—i.e., returning capital to Limited Partners. This systemically prioritizes liquidity and successful exits over simply deploying capital or marking up portfolio value on paper.

While many investors screen for companies with high Return on Invested Capital (ROIC), a more powerful indicator is the trajectory of ROIC. A company improving from a 4% to 8% ROIC is often a better investment than one stagnant at 12%, as there is a direct correlation between rising ROIC and stock performance.

The secret to top-tier long-term results is not achieving the highest returns in any single year. Instead, it's about achieving average returns that can be sustained for an exceptionally long time. This "strategic mediocrity" allows compounding to work its magic, outperforming more volatile strategies over decades.