Low confidence in this split. R² is only 0.05: market, sector, and rate moves together barely track QSR's day-to-day returns over this window, so the betas below are noisy and the systematic/idiosyncratic split is rough at best. This itself is informative: QSR is trading on its own news, not macro.
Of QSR's +15.1pp move over this window, +14.0pp (93% of the total magnitude) is idiosyncratic, not explained by riding market, sector, or rate moves. The rest (+1.1pp) came from systematic exposure: market +2.2pp, sector -0.6pp, rate -0.5pp.