Paytm UPI: Paytm has enabled support for UPI trading blocks i.e. Single Block Multiple Debits. This means now you can trade in the stock market (BSE SENSEX, NSE NIFTY, and others) without first adding money to your demat account. Using Paytm UPI you can create a block request like ASBA and money will only be debited when you execute any securities buy trade.