The December quarter earnings season is set to kick off this week for Nifty50 companies. TCS, Infosys, HCL Tech and Wipro are the ones slated to post their Q3 numbers between Thursday and Friday, with most analysts pencilling in a weak show. Here’s a look at the Nifty50 companies that may post an over 15% year-on-year (YoY) decline in Q3 PAT, according to estimates by Motilal Oswal: