Benchmark polished diamonds prices moved 17.3% over the past four weeks, the sharpest swing since Q2 FY27, as inventories abroad normalised and shipping schedules recovered. The move has quickly filtered into spot quotes at Chennai, where dealers reported narrower spreads and thinner volumes through the week.

Physical premiums tell a similar story. Delivered premiums at Chennai compressed by about $45 million per tonne equivalent, and buyers report that sellers are now willing to quote longer validity periods, a reversal from the short-fuse offers that dominated earlier in the year.

What moved and why

Currency is an important second driver. The rupee traded in a narrow band against the dollar, helped by steady inflows and a decline in crude, and forward premiums eased to levels that make hedging more attractive for importers with a three-to-six month horizon. Treasury heads say they are extending hedge tenors.

Global cues remain mixed. Demand data from Brazil came in softer than expected, while restocking in South Korea offered a counterweight. The net effect is a market that is range-bound in the near term but sensitive to any surprise in freight or policy.

On the other side of the ledger, producers are watching margins. Realisations for domestic Energy suppliers fell 9.9% on the month, and two listed companies trimmed guidance in post-results calls. Management teams pointed to input cost relief as a partial offset, but warned that price competition would intensify.

“The disagreement among analysts is the most useful data point this quarter: it says positioning is no longer one-sided.”

Winners, losers and margins

Strategists are less unanimous about what comes next. One brokerage raised its target for the sector on earnings upgrades, while another cut its rating citing valuations at 9.9% above the five-year average. The disagreement, one fund manager noted, is itself a sign that the trade is maturing.

The immediate beneficiaries are importers who left positions unhedged. Maruti Suzuki, which buys roughly 1,772 tonnes a quarter, said it had trimmed its landed cost by 30.1% since the start of the month and was deferring forward purchases in anticipation of further softness.

Positioning and hedging

Equity markets have taken a constructive view of the sector. The Energy index gained 17.3% over the quarter, outpacing the broader market by about two percentage points, with the largest moves in names that disclosed order books extending beyond twelve months.

For corporate buyers, the practical advice from risk consultants is to layer hedges rather than chase the move: cover 40 to 60 percent of the next two quarters at current levels, keep optionality for the remainder and revisit after the next inventory report.

The range ahead

Derivatives data points to cautious positioning. Open interest in polished diamonds contracts rose 30.1% while implied volatility eased, a pattern desk traders read as hedgers adding protection rather than speculators adding risk. Options skew suggests more demand for downside protection than for upside.