Commenting on the numbers, ICRA Ltd Chief Economist Aditi Nayar said that the acceleration of eight core sector growth in October was driven by petroleum refinery products, reflecting rising mobility, ramping up of coal output given the tight supply situation that was prevailing in various power plants, as well as cement and electricity. ''With a mixed trend displayed by most early indicators that are available for November 2021, we expect the core sector growth to slip to under 5 per cent for this month,'' she said adding ''while the core sector growth has accelerated and the festive season trends were broadly positive, the 22 per cent contraction in auto output is likely to push the October 2021 IIP growth to below 2.5 per cent''.