r&d
R&D Efficiency Backtest (US): 4.09% CAGR, Two Regimes, One Regime Shift
From 2000 to 2012, buying stocks with the highest gross profit per R&D dollar beat the S&P 500 consistently. Then mega-cap tech took over, and the strategy spent the next twelve years giving money back. 4.09% CAGR against 7.85% for SPY. 25-year backtest, full data, SQL included.