Today, the start of the F&O expiry session is likely to be flat to positive and with the progress of trade volatility can be seen. The SGX Nifty, which was trading up by 27 points at 11,164, indicated that domestic bourses may witness marginal higher opening. Among Nifty 50 companies, Bharti Airtel, Dr Reddy’s Laboratories, ITC, Maruti Suzuki India and Yes Bank will announce their results today.