Benchmark polished diamonds prices moved 4.5% over the past four weeks, the sharpest swing since Q4 FY26, as inventories abroad normalised and shipping schedules recovered. The move has quickly filtered into spot quotes at Visakhapatnam, where dealers reported narrower spreads and thinner volumes through the week.

Global cues remain mixed. Demand data from Japan came in softer than expected, while restocking in Saudi Arabia 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.

What moved and why

Credit conditions have helped. Working-capital spreads for Power borrowers narrowed by roughly 25 basis points, and corporate bond issuance from the sector reached $7.4 billion for the year to date, the highest in three years. Rating agencies have upgraded four issuers while downgrading none.

The immediate beneficiaries are importers who left positions unhedged. Infosys, which buys roughly 1,869 tonnes a quarter, said it had trimmed its landed cost by 9.4% since the start of the month and was deferring forward purchases in anticipation of further softness.

Physical premiums tell a similar story. Delivered premiums at Visakhapatnam compressed by about $165 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.

“Chasing a falling price is how treasurers get hurt. Layer in, do not lunge.”

Winners, losers and margins

On the other side of the ledger, producers are watching margins. Realisations for domestic Power suppliers fell 10.1% 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.

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 10.1% above the five-year average. The disagreement, one fund manager noted, is itself a sign that the trade is maturing.

Positioning and hedging

Derivatives data points to cautious positioning. Open interest in polished diamonds contracts rose 9.4% 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.

Equity markets have taken a constructive view of the sector. The Power index gained 4.5% 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.

The range ahead

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.