Further Empirical Evidence of the Predictive Power of SIRRIPA from a Sample of 27 Japanese Technology Stocks

SummaryThis technical note examines the predictive power of SIRRIPA (Stock Internal Rate of Return Including Price Appreciation) using 27 comparable Japanese technology and electronics stocks ranked as of December 23, 2025. Comparing initial SIRRIPA levels with subsequent stock performance over approximately 4.5 months, the analysis finds a positive and economically meaningful relationship. Cross-sectional regression yields a correlation coefficient of approximately r = 0.285 and an R2 of approx