ASX 200 Index Earning Revision (Oct): Woodside Energy, Santos, Fortescue, Rio Tinto, DroneShield

Abstract: We analyzed earnings revisions for ASX 200 component stocks over October 2026. Individual stock EPS revisions attributed negative A$2.33 to the index's 2027E EPS, with 53 stocks revised up versus 105 revised down, while the index itself rose 1.4% to 8,908. Energy names drove the biggest positive EPS impact, with Woodside Energy's 2027E EPS up 15.4% adding A$2.45 to index EPS and Santos up 24.7% adding A$2.01, even as the index price gained. Fortescue was the largest drag, with 2027E EPS down 29.0% subtracting A$1.86, followed by Rio Tinto down 5.7% subtracting A$0.88 and Pilbara Minerals down 23.6% subtracting A$0.84. DroneShield posted the sharpest EPS cut of the month at negative 46.7%, while Whitehaven Coal led upward revisions at positive 26.6%.