The market regulator will take up the issue of alleged unfair access at National Stock Exchange (NSE) at its board meeting on Saturday, sources said. Securities and Exchange Board of India (Sebi) is also likely to tell its board about current participatory note (P-note) framework and may recommend against further tightening it. The board meeting after Union Budget is customary; it could be attended by Union finance minister Arun Jaitley. The countrys largest exchange firm, NSE, is embroiled in allegations of allowing unfair access to trade data to certain brokers at co-location facility. At a colocation centre, you can place your computer containing trading algorithms next to an exchange’s data centre, which matches buy and sell orders. This shaves crucial milliseconds from the time it takes to complete a trade. If traders are located 100 miles away from an exchange, they face a delay of one millisecond whenever they seek to trade a price via their computer screen. "