Platinum COT Brief for the week of September 18, 2026

Executive summary

In a week marked by a significant price drop and declining open interest, speculative funds reduced their bullish exposure while commercial participants bought into the weakness. Managed Money cut their net long position, driven by both long liquidation and fresh shorting. Conversely, Producer/Merchants trimmed their substantial net short position, suggesting they view lower prices as an opportunity to reduce hedges. Overall open interest fell, indicating that the move was primarily driven by the exiting of long positions rather than a build-up of aggressive new shorts.

Positioning

• Managed Money: The net long position for money managers fell to +8,972 contracts. This is a reduction from +9,787 contracts the prior week and is significantly below the peaks seen earlier in the year (e.g., over +16,000 contracts in April).
• Producer/Merchant (Commercials): This cohort remains heavily net short at -11,969 contracts. However, this is one of their least-short positions in recent months, continuing a trend of reducing their hedge book from levels near -17,000 contracts late last year.
• Swap Dealers: Swap Dealers hold a significant net short of -7,840 contracts, an increase in their short exposure from the prior week. They appear to be absorbing some of the buying from Commercials.

Flows and week-over-week changes

• Managed Money was the primary net seller, reducing their net long by 815 contracts. This was a bearish combination of liquidating 463 long contracts while adding 352 short contracts.
• Producer/Merchants were net buyers, reducing their net short position by 374 contracts. This was achieved by cutting their short positions (-503 contracts) more than their longs (-129 contracts).
• Swap Dealers increased their net short position by 335 contracts, trimming 162 longs while adding 173 shorts.
• Non-Reportable (Retail) traders were aggressive buyers into the price decline, adding a net 717 contracts to their long position. This was composed of 548 new longs and a reduction of 169 shorts.

Commercials vs speculators

The classic divergence between commercials and speculators was on display this week. - Speculators: Managed Money sold into the price drop, signaling a reduction in bullish conviction. - Commercials: Producers and Merchants took the other side, using the price decline to reduce their short hedges. This is often interpreted as a sign that physical market players see current prices as more attractive. - The market structure remains one where speculators (Managed Money, Other Reportables, and Non-Reportables) are collectively net long, while Commercials and Swap Dealers are the primary net short holders.

Open interest and participation

• Total open interest in PL futures fell by 2,332 contracts to a total of 65,478.
• The decrease in open interest alongside the price drop and Managed Money selling suggests the primary market dynamic was long liquidation. This is generally less bearish than a price drop accompanied by rising open interest, which would imply aggressive new short selling.
• Overall participation remains subdued compared to levels seen earlier in the year, which were closer to 80,000-90,000 contracts.
• Concentration: The short side remains highly concentrated. The largest four traders hold 31.7% of the net short position, while the largest eight hold 43.8%. This concentration could exacerbate any potential short-covering rally.

Price context

Note: The provided daily price series is sparse, with gaps in the data. - The positioning changes are consistent with a falling price environment. The last available price before this report's as-of date was $1904.5 on September 9th. The price on September 18th was $1800.0, a significant decline. - The Managed Money reduction of net length aligns with this sharp price drop, while the reduction in the Commercial net short position reflects their buying into that weakness.

Risks and watchpoints

• Downside Risk: Continued long liquidation from Managed Money is the primary risk. If speculative funds continue to exit, prices could face further pressure, especially given the backdrop of declining open interest.
• Watchpoint (Bullish): The continued reduction of the Commercial net short position is a constructive signal. If this trend persists, it may indicate a price floor is being established as physical market participants find value.
• Volatility Risk: The high concentration on the short side remains a key watchpoint. While these positions have been profitable recently, any unexpected bullish catalyst could force a rapid covering of these large shorts, potentially leading to a sharp price rally. The relatively low level of open interest could amplify such a move.