The policy rate and OMOs are the workhorses. Around them sit four more tools, each with a distinct mechanism.
What are reserve requirements and the CRR?
Reserve requirements: the CRR. A reserve requirement obliges banks to hold a minimum fraction of their deposits as reserves at the central bank. In India this is the Cash Reserve Ratio (CRR), a percentage of a bank's net demand and time liabilities (NDTL) that must sit at the RBI, earning no interest (around 3–4% as of mid-2026; the RBI announced a phased cut toward 3% in 2025). Two things it does. (1) It is a liquidity and transmission tool: raising the CRR locks up reserves and drains lending capacity (a blunt tightening); cutting it releases reserves (an easing that also directly lifts bank profitability, since idle non-earning cash becomes lendable). (2) Because CRR balances earn nothing, the CRR is a tax on banks, and a cut is a direct gift to net interest margins (tie to M5.01). Crucially, note what the CRR is not: it is not the mechanism by which banks are constrained from lending in the modern view. M7.01's endogenous-money lesson holds: banks lend first and find reserves after (borrowing them at the policy rate if need be); the reserve requirement raises the cost of that lending at the margin rather than imposing a hard multiplier. The US makes the point vividly: the Fed cut its reserve requirement to zero in March 2020 and monetary policy did not break, because in an "ample-reserves" regime the requirement was never the binding constraint. The CRR is a live, used tool in India and a near-dead one in the US — a difference worth remembering.
Advertisement
What is the statutory liquidity ratio (SLR)?
The SLR: India-specific, and more than it looks. The Statutory Liquidity Ratio requires every Indian bank to hold a minimum fraction of its NDTL, 18% as of mid-2026 , in approved liquid assets, overwhelmingly government securities. Superficially it is a prudential/liquidity rule (a buffer of safe, sellable assets). Look closer and it is one of the most important structural facts about Indian finance, for two reasons an analyst must see. First, it creates a captive, guaranteed buyer for government debt: by law, ~18% of the entire banking system's deposit base must be lent to the government, which holds down the government's borrowing cost. This is a form of what economists call financial repression (the state funds itself cheaply by regulation rather than by paying a market rate; connect to M7.04's debt dynamics). Second, together with the CRR it means a large slice of every deposit rupee is pre-committed before a bank can lend to a business at all (CRR + SLR ≈ 21–22% locked up), which is exactly why the CD ratio's comfort zone is ~75–85% and not 100% (M5.01). The SLR is the reason "how much can Indian banks actually lend" has a structural ceiling the US simply does not have.
What is forward guidance?
Forward guidance: words as a tool. The most modern tool is talk. Because what matters for spending and investment is not today's overnight rate but the expected path of rates over years (a 5-year loan is priced off the expected average short rate over 5 years, not tonight's rate), a central bank can move long rates today by credibly signalling tomorrow's policy. That is forward guidance: an explicit or implicit commitment about the future path of the policy rate. It comes in flavours worth naming: calendar-based ("rates will stay low at least through 2024"), state-contingent ("we will not hike until unemployment falls below 6.5%", the Fed's 2012 "Evans rule"), and the softer open-mouth operations of a governor's carefully chosen adjective. Economists distinguish Delphic guidance (a forecast: "we expect to be on hold") from Odyssean guidance (a commitment that ties the central bank's hands, like Odysseus lashed to the mast: "we will hold, even if we're later tempted to move"). Guidance is powerful and cheap (it costs nothing to say), which is also its weakness: it works only as far as it is credible, and a central bank that guides one way and moves another burns the credibility that makes the tool work at all. This is why every word of a statement is parsed (see reading a policy statement like an analyst) — the words are policy.
How does central bank FX intervention work?
FX intervention: the managed float. A central bank can buy or sell its own currency in the foreign-exchange market to influence the exchange rate. The Fed and ECB essentially never do this (the dollar and euro float freely); the RBI does it routinely, because India runs a managed float: the rupee is market-determined but the RBI intervenes to smooth volatility, not to defend a particular level. The mechanism, and its catch: to stop the rupee falling, the RBI sells US dollars from its FX reserves and buys rupees. That withdraws rupee liquidity from the domestic system (rupees come in and are extinguished), inadvertently tightening domestic monetary conditions. To stop the rupee rising, it buys dollars and pays in newly created rupees, injecting rupee liquidity and loosening conditions, and building up FX reserves. Notice the tangle: FX intervention and domestic monetary policy are the same balance sheet, so an FX operation is also a domestic-liquidity operation unless the central bank deliberately offsets it with an OMO in the other direction. That offset is called sterilized intervention (sell dollars and buy G-secs to put the drained rupees back). This is the analyst's first glimpse of the impossible trinity (formalized in M7.06): a country cannot simultaneously have a fixed exchange rate, free capital flows, and an independent monetary policy — it must give up one. India's answer is the managed float: it keeps monetary independence and open-ish capital flows, and lets the rupee move (while smoothing it with reserves). Why does an equity analyst care? Because a company with dollar debt or import costs (M7.06) lives or dies by this, and because heavy FX intervention silently tightens or loosens the domestic liquidity that sets the rate under every Indian valuation.