Week 28 Day 5: Reinvestment: The Silent Multiplier

From 1960-2023, the S&P 500 returned approximately 10.5% per year with dividends reinvested. Without reinvesting dividends: approximately 7.0%. The 3.5% difference from reinvested dividends, compounding over 63 years, is the difference between $10,000 growing to $5 million versus $700,000. Same stocks, same period, but 7x more wealth just from reinvesting dividends.

The reinvestment math over 30 years with $10,000 invested in VTI: Without reinvesting dividends: $10,000 at 7% for 30 years = $76,123. Dividends collected but not reinvested: approximately $35,000 (sitting in cash). Total: $111,123. With reinvesting dividends: $10,000 at 10.5% for 30 years = $198,374. The extra $87,000 came from dividends being reinvested into more shares, which earned more dividends, which bought more shares. Each dividend payment is small (typically 1-2% per quarter), but the compounding effect over decades is enormous. Implementation: ensure DRIP (Dividend Reinvestment Plan) is enabled on all your accounts. At Fidelity: Account Settings -> Dividends and Capital Gains -> Reinvest. At Vanguard: My Accounts -> Account Maintenance -> Dividend Reinvestment. At Schwab: Account Settings -> Dividend Reinvestment. This takes 60 seconds and adds hundreds of thousands of dollars over a lifetime. The only exception: in retirement, you may want dividends paid in cash to fund living expenses rather than reinvested.

The contribution of reinvested dividends to total equity returns has been documented extensively. Siegel (2014) showed that from 1871-2012, real (inflation-adjusted) stock returns averaged 6.6% per year. Of this, approximately 4.4 percentage points came from capital gains (price appreciation) and approximately 2.2 percentage points came from dividend income. However, the reinvestment effect is nonlinear: reinvested dividends compound over time, and the share of terminal wealth attributable to reinvested dividends increases with the investment horizon. At 10 years, reinvested dividends account for approximately 25% of total return. At 20 years: approximately 40%. At 30 years: approximately 55%. At 40+ years: approximately 70%+. This is because the number of shares owned grows exponentially through reinvestment, and each new share generates additional dividends. Arnott and Asness (2003) further showed that higher dividend payout ratios predict higher future earnings growth (contradicting the intuition that companies should retain and reinvest all earnings). Companies that pay dividends tend to allocate capital more efficiently because management faces the discipline of generating sufficient cash flows to maintain the dividend. This 'dividend discipline hypothesis' provides a fundamental explanation for why dividend-paying stocks (like SCHD's holdings) tend to outperform over long periods on a risk-adjusted basis.