Contents
Definition
Open Market Operations (OMOs) are the purchase or sale of Government of India dated securities (G-Secs) by the Reserve Bank of India in the secondary market with the explicit objective of managing banking system liquidity. When RBI buys G-Secs (OMO purchase / "OMO buy"), it injects rupee liquidity into the banking system — expansionary. When RBI sells G-Secs (OMO sale / "OMO sell"), it absorbs liquidity — contractionary. OMOs are a more targeted instrument than CRR or repo: they directly influence the quantum of durable liquidity and simultaneously affect G-Sec prices and yields in the secondary market. OMOs are announced by RBI's Financial Markets Operations Department and conducted through the E-Kuber system via multi-security auctions.
How They Work
RBI announces OMO auctions typically with 24–48 hours' notice on its website. Eligible counterparties are banks and Primary Dealers (PDs) — the same participants as primary G-Sec auctions. Bids are price-based (banks quote the yield/price at which they will sell/buy G-Secs). RBI selects bids up to the notified amount at the weighted average price. Settlement is T+1. Special OMOs ("Operation Twist"): A variant introduced in 2019-20 where RBI simultaneously conducts OMO purchase of long-term G-Secs and OMO sale of short-term G-Secs — compressing the yield curve by reducing long-end supply and increasing short-end supply. OMO calendars are not published in advance like T-Bill auctions; they are discretionary responses to liquidity conditions. G-SAP (Government Securities Acquisition Programme), used during COVID-19, was a committed OMO purchase schedule — a more transparent, predictable version of OMO.
Why It Matters for Investors
- Bond price support: OMO purchases reduce the effective supply of G-Secs in the market, pushing prices up and yields down — directly positive for gilt fund NAVs.
- Yield curve management: Large fiscal deficits require GoI to borrow heavily; without OMO support, heavy supply would push long-bond yields up. RBI's OMO calendar is therefore closely watched by fixed-income fund managers.
- Liquidity signal: Frequent OMO purchases signal RBI's intent to maintain accommodative liquidity — a positive macro signal for equities and bonds. OMO sales signal tightening beyond what the repo rate conveys.
- Debt fund positioning: Duration funds and gilt funds are most affected. Active fund managers track RBI liquidity reports and budget borrowing calendars to anticipate OMO frequency.
Current Value + Recent History
FY2020-21 was the peak OMO purchase year: RBI conducted over ₹3.1 lakh crore of G-SAP and OMO purchases to anchor yields at low levels despite massive government borrowing (fiscal deficit surged to 9.2% of GDP). This kept the 10Y G-Sec yield capped at 5.9–6.2% throughout FY21 despite ₹18 lakh crore of gross government borrowing. In FY2023-24, RBI shifted to OMO sales on select occasions to manage surplus liquidity — notably in October-December 2023, when RBI conducted OMO sales totalling approximately ₹30,000 crore to drain excess liquidity. As of Q1 2024, the system is in mild liquidity deficit mode; RBI is using Variable Rate Repo (VRR) auctions rather than OMOs for near-term liquidity management, with OMOs held in reserve for structural liquidity adjustments.
Worked Example
Tracing an OMO purchase through to a gilt fund NAV:
- Setup: 10Y G-Sec yield at 7.45% in November 2022. RBI announces OMO purchase of ₹25,000 crore of 10Y paper.
- Immediate market impact: RBI demand reduces available supply; market participants bid at lower yields to sell to RBI. 10Y yield falls 8–12 bps on announcement day to ~7.33–7.37%.
- NAV impact on gilt fund: A 10-year bond with modified duration of ~7 years sees price appreciation of approximately 7 × 0.10% = 0.70% on the 10 bps yield fall. A gilt fund with 8-year average duration sees a 1-day NAV gain of ~0.56% — significant for a debt instrument.
- Reverse scenario (OMO sale): RBI sells ₹10,000 crore of 10Y paper; yield rises 5–8 bps; gilt fund NAV falls 0.35–0.56% on that day. Duration funds book 1-day losses from a single RBI announcement.
See Also
- Treasury Bill (T-Bill)
- Statutory Liquidity Ratio (SLR)
- Repo Rate
- Gilt Funds — Duration Risk and RBI Policy
- Reserve Bank of India
Primary Source
RBI — OMO Auction Calendar and Results | RBI — G-SAP 1.0 Announcement April 2021
This glossary entry is for educational purposes only and does not constitute investment advice. Mutual fund investments are subject to market risks. MintByte Research is AMFI-registered (ARN-314872) and APMI-registered (APRN-01658). Past performance is not indicative of future returns.