Shares of several auto ancillary companies, including Bosch, JBM Auto, and Samvardhana Motherson, surged up to 12% on Friday, hitting 52-week highs. This demand is attributed to strong December auto wholesale numbers surpassing expectations for many original equipment manufacturers (OEMs). Companies like Igarashi Motors India saw significant volume jumps, with their stock prices rallying substantially. The broader market, represented by the BSE Sensex, showed a more modest gain during the same period.