On Friday, October 9, the rupee was trading around 96.7 against the dollar, uncomfortably close to the 97 mark and near its all-time low. Then the Reserve Bank of India did something that tells you how seriously it was taking the situation. It announced a package of measures on a Saturday. By Monday, October 12, the rupee had gained 96 paise to close around 95.76, its sharpest single-day gain in roughly six months.

Three levers did the work. A special dollar window for three oil companies, a ban on rebooking cancelled currency hedges, and sharply lower limits for taking rupee positions without a real underlying need. Here is how each one works, and what it means for your portfolio.

Why the Rupee Was Sliding in the First Place

The rupee has lost about 6 percent since the West Asia conflict began in late February, and more than 8 percent over the past year. Oil is the obvious driver, since India imports most of its crude, a link we explained in our piece on the rupee coming under pressure amid oil spikes. Foreign investors added to the pressure by pulling money out of equities, which we covered in why FPIs pulled Rs. 35,000 crore from India in September.

RBI had already been selling dollars from its reserves to slow the fall. India's forex reserves dropped about US$ 51.1 billion in the four weeks to October 2, after touching a record US$ 785.7 billion in the week ended September 4. Even the repo rate hike on October 7, which we previewed in everything to know before the RBI rate decision, did not settle the currency. The rupee was still near its lows three days later, which is why the central bank went further.

Lever One: A Special Dollar Window for Oil Companies

RBI said it will sell dollars through designated banks to meet the entire daily dollar requirement of three public sector oil marketing companies, Indian Oil, HPCL and BPCL. The facility started on October 12 and will stay in place until further notice.

The logic is simple once you picture a normal trading day. Oil companies buy dollars every day to pay for imported crude, which makes them one of the largest and most predictable sources of dollar demand in the market. When that demand lands in the open market, dealers see it coming and speculators position ahead of it, which pushes the rupee down further than the underlying need alone would. Taking that buyer out of the open market removes a daily pressure point. These are the same companies whose exposure to crude and policy shocks we examined in our coverage of Saudi Aramco halting India crude supply and the US-Russia sanctions act and its 100 percent tariff threat for BPCL, IOCL and HPCL.

There is a trade-off, and analysts have flagged it. The window does not create dollars, it moves the selling from the market to the central bank, so the cost shows up as lower reserves. That matters given how much the reserves have already fallen.

RBI has used this tool before. In late August 2013, when the rupee touched a then record low of 68.85, it opened a similar swap window for the same three companies. By late October that year the rupee had strengthened about 10.7 percent from that day, helped by other measures as well, and RBI withdrew the window in early December once things stabilised. The lesson from that episode is that these windows are meant to be temporary.

Lever Two: Curbs on Speculative Trading

The second set of measures targets people betting against the rupee rather than people who genuinely need dollars. There are three parts to it.

First, banks can no longer let users rebook a rupee derivative contract, deliverable or non-deliverable, that has been cancelled after the new directions were issued. Rollover of contracts at maturity is still allowed, so genuine hedgers are not locked out. The point is to stop the cycle of booking, cancelling and rebooking, which lets a participant keep re-establishing the same position.

Second, the threshold for taking a rupee derivative position without an underlying exposure has been cut to US$ 5 million from US$ 100 million. The same cut applies to exchange-traded currency derivatives, measured across all recognised exchanges taken together.

Third, RBI introduced a Foreign Exchange Risk Reserve, or FERR. Forex dealers must now hold a reserve equal to 20 percent of the notional amount of each eligible rupee derivative, which applies to hedges for current account exposures where the user buys foreign currency against rupees. In plain terms, it makes it more expensive for banks to sell dollar hedges, and that cost will likely be passed on to whoever buys them.

Measure	What It Does	Who Feels It
OMC dollar window	RBI sells dollars for the entire daily need of IOC, HPCL and BPCL	Oil companies, spot market dealers
Rebooking ban	Cancelled rupee derivative contracts cannot be rebooked, rollovers still allowed	Corporates, active speculators
Position threshold	Positions without underlying exposure capped at US$ 5 million, down from US$ 100 million	Large speculators and funds
FERR	Dealers hold a 20 percent reserve on eligible hedges buying dollars against rupees	Banks, importers who hedge

What Happened on Monday

The rupee gained 96 paise on October 12 to close in the range of 95.75 to 95.77, a clear break from the slide. It is worth being honest about the credit, though. Oil prices also eased that day on ceasefire-related news, so RBI's measures were not the only reason for the move. What the package did do was remove two sources of pressure at once, the daily dollar demand from oil companies and the room for speculative positions, so the rupee could respond to the better news instead of being held back.

Will It Hold?

These measures treat the symptoms rather than the causes. Oil, foreign outflows and high US yields have not gone away, and the reserves are paying for the window every day it stays open. History suggests RBI knows this. In December 2011, when the rupee hit a record low near 54.30, it also curbed currency forwards and cut banks' forex trading limits to stop speculation, and the focus then was on letting genuine demand and supply move the currency rather than speculative bets. Earlier this year, big inflows into FCNR deposits helped build buffers, as we covered in our piece on Rs. 12.9 lakh crore of FCNR inflows reshaping bank stocks and the rupee. The current episode shows how quickly such buffers can be used.

Crude is the variable that matters most. If it eases further, the window becomes cheaper to run and RBI can wind it down. Our MCX crude oil strategy piece on the first sub-100 close since the Iran war is a useful read for tracking that side of the story.

What This Means for Your Portfolio

IT companies earn in dollars, so a weaker rupee has been a tailwind for them, something we explained in why IT stocks rise while the market falls on a weak rupee. A stronger rupee trims some of that benefit, though one good session does not change the picture. For BPCL, IOC and HPCL, the window eases the daily scramble for dollars, but the terms of the facility are not public in what has been reported, so watch company commentary before drawing conclusions about margins.

Importers and exporters who hedge with forwards should expect hedging to become costlier because of the new reserve requirement. And if you trade rupee futures or options on the exchanges, most retail positions are far below US$ 5 million, but it is sensible to check your broker for any circulars on the new limit.

This article is for informational purposes only and should not be construed as investment advice. Regulatory measures and exchange rates change quickly; please verify the latest RBI notifications and market levels before making financial decisions.

Frequently Asked Questions (FAQ)

1. What did RBI announce on October 10 to support the rupee?

RBI announced a special dollar window for three oil companies, a ban on rebooking cancelled rupee derivatives, a lower limit of US$ 5 million for positions without underlying exposure, and a 20% Foreign Exchange Risk Reserve for eligible hedges.

2. Which oil companies get the special dollar window?

Indian Oil, HPCL and BPCL. RBI will sell them dollars through designated banks to meet their entire daily requirement from October 12 until further notice.

3. What is the Foreign Exchange Risk Reserve (FERR)?

Forex dealers must hold a reserve equal to 20% of the notional amount of each eligible rupee derivative used to hedge current account exposures by buying foreign currency against rupees.

4. How did the rupee react to the measures?

The rupee gained 96 paise on October 12 to close around 95.75 to 95.77 per dollar, its sharpest single-day gain in about six months, with softer oil prices also helping.

5. Does the rebooking ban stop genuine hedging?

No. Rollover of derivative contracts at maturity is still permitted. Only the rebooking of contracts that were cancelled after the directions were issued is barred.