Open Market Operations
Open Market Operations (OMOs) are the RBI's purchases and sales of government securities in the open market to regulate liquidity conditions in the banking system and to influence yields on government bonds. OMO purchases inject rupee liquidity, while OMO sales absorb it.
Open Market Operations are among the most powerful instruments in the RBI's monetary policy toolkit, allowing the central bank to directly influence the supply of money in the banking system without changing the policy rate. When the RBI conducts an OMO purchase — buying government securities from banks and primary dealers — it credits their accounts with fresh rupee liquidity. This additional liquidity suppresses short-term rates and, by increasing demand for bonds, tends to push yields down across the curve. OMO sales work in reverse: the RBI sells bonds from its portfolio, draining liquidity from the system and exerting upward pressure on yields.
Historically, the RBI used OMOs aggressively during periods of both liquidity deficit and surplus. During the demonetisation period of late 2016 and early 2017, the RBI conducted large-scale OMO sales to absorb the extraordinary liquidity surge caused by deposits flooding into banks. Conversely, during fiscal years when the government borrowed heavily and bond yields rose uncomfortably, the RBI stepped in with OMO purchases to cap yields. The COVID-19 pandemic saw some of the most aggressive OMO operations in Indian monetary policy history, with the RBI buying over Rs 3 lakh crore of G-Secs during 2020–2021 to ensure financial conditions remained accommodative.
A specialised form of OMO is the Simultaneous Purchase and Sale of Government Securities, colloquially called 'Operation Twist.' Inspired by a similar US Federal Reserve strategy, the RBI conducted multiple rounds of Operation Twist from 2019 onward. In these operations, the RBI simultaneously purchased long-tenor G-Secs (suppressing long-term yields) and sold short-term T-Bills (absorbing short-end liquidity). The net liquidity impact was roughly neutral, but the objective was to flatten or steepen the yield curve to ease borrowing conditions for the government and corporates.
For investors in gilt funds, duration funds, and long-term bond funds, OMO announcements are market-moving events. An unexpected OMO purchase announcement often triggers a sharp rally in bond prices as yields fall. Fixed income portfolio managers therefore closely watch RBI's weekly liquidity management operations, including the LAF repo window, standing deposit facility, and OMO calendar, to anticipate yield direction. Understanding OMOs is also key to interpreting the RBI's unspoken stance on government borrowing costs — even when no formal rate change is announced.