The Sensex and Nifty have dropped 10% from peaks on September 27, resulting in the indices entering the technical corrective phase. When an index falls 10% from its peak in a short span, it’s considered a correction. A 20% decline makes it a bear phase. The Sensex and Nifty have dropped 10% from peaks on September 27, resulting in the indices entering the technical corrective phase. When an index falls 10% from its peak in a short span, it’s considered a correction. A 20% decline makes it a bear phase. Economic Times