Positive SPX–10Yr Yield Correlation Has Prevailed Near 4%–5% . . . . . . But Relationship Has Typically Been Negative At 10Yr Yields Well Above 5%

September 25, 2026This is a trajectory plot of the rolling correlation between S&P 500 moves and 10-year Treasury yield moves ...

5-Star Reviews but Sales Remain Flat—The Trap of a 0.6 Correlation

You may have heard the story that "when Amazon reviews hit 5 stars, sales doubled." In fact, many e-commerce companies find a positive correlation between review star counts and sales, leading them to ...