Mumbai, December 20: Leading Brokerages are upbeat on the benchmark indices for calendar 2020 beginning next month. Kotak Securities has set a one year target of 13,400 points for Nifty-50, of the National Stock Exchange (NSE). The similar target for the BSE Sensex would work to 45,500 points by the end of December 2020, the brokerage revealed in a select media briefing.