LBMA Gold Price AM and PM: How the Twice-Daily Auction Actually Sets the Benchmark

Why a Twice-Daily Auction Runs the Gold Market

The LBMA Gold Price is set twice each business day: at 10:30 (AM auction) and 15:00 (PM auction) London time. These two prices — the AM Fix and the PM Fix — serve as the global reference for the settlement of physical gold contracts, ETF NAV calculations, central bank transactions, jewelry industry pricing, and many other applications that need a single agreed-upon "price of gold" for the day.

Despite serving markets worth trillions, the auction itself is a relatively small event mechanically: an electronic auction lasting a few minutes, with a small number of accredited participating banks submitting bids and offers, converging to a single clearing price. This piece walks through how the mechanism works, why it produces a trustworthy benchmark despite the small participant count, and what a market-watcher should understand about how the fix relates to the continuous OTC spot market that runs around the clock.

The Modern Auction Structure

The current LBMA Gold Price auction, administered by ICE Benchmark Administration since 2015, is an electronic auction with the following structure:

The direct participants as of recent years include major banks and refiners: JPMorgan, HSBC, Goldman Sachs, ICBC Standard, Morgan Stanley, Bank of China, Standard Chartered, UBS, and a handful of others. Direct participant lists are published by ICE and change occasionally as banks enter or exit the panel.

How the Auction Reaches a Price

The auction is a form of Walrasian tâtonnement: the auctioneer publishes a starting price, participants submit buy and sell orders at that price, the auctioneer measures the net order imbalance (excess bid or excess offer), then publishes an adjusted price. Buy imbalance means price should rise to clear; sell imbalance means price should fall. Rounds continue until the net imbalance is within a tolerance considered "cleared."

The specific starting price for the first round is usually a live spot price captured at the auction start. Subsequent rounds move away from that starting point based on observed imbalance. Because the auction runs multiple rounds until it converges, the final price reflects the actual willingness of the accredited participants to trade at that price on that specific day.

The result is that the fix is not a survey (the pre-2015 mechanism was closer to that), and it is not simply a snapshot of the OTC spot price at that moment. It is a genuine price at which actual gold changed hands in the auction, plus proxy orders from downstream participants routed through the directs.

Why the Fix Matters

Despite being a small auction, the fix underwrites a large ecosystem of financial products and physical transactions. The main uses:

AM Fix vs PM Fix — Different Uses, Sometimes Different Levels

The two daily fixes serve different downstream uses. The AM fix (10:30 London) captures European morning trading and is often preferred for Asian settlement links because it happens later in the Asian day. The PM fix (15:00 London) captures New York morning trading and is often preferred for American settlements and for ETF NAV calculation because it aligns better with US market close.

The AM and PM fixes on the same day can differ meaningfully. In an active-market day with news catalysts, the spread between AM and PM can be $10-20 per ounce or more. On quiet days the spread is usually within a few dollars. The difference is not error; it reflects actual price movement between 10:30 and 15:00.

The History and Its Reforms

Prior to 2015, the London Gold Fix was set through a private conference call ("the fixing") among five specific banks: Barclays, Deutsche Bank, HSBC, Bank of Nova Scotia, and Société Générale. This mechanism dated back to 1919 in similar form and had operated with modernizations for nearly a century.

The pre-2015 fixing came under significant regulatory and legal scrutiny in the early 2010s, with allegations of manipulation and inadequate transparency. Multiple settlements and enforcement actions followed. In response, LBMA moved to the current ICE-administered electronic auction in March 2015. The reform addressed the main criticisms: the mechanism became electronic, auditable, and open to more participants than the original five-bank group.

The post-2015 mechanism has been generally well-regarded and has not faced comparable scrutiny. The core function — providing a globally accepted daily reference price for gold — has been preserved through the transition.

How the Fix Relates to Continuous Spot

The OTC gold spot market runs 24 hours a day across time zones, with prices continuously updated as banks trade with each other. The LBMA fix is a specific snapshot within this continuous market. The relationship between them:

Silver Fix Note

LBMA Silver Price is set once daily at 12:00 London time (noon), also via ICE-administered auction, with a different but overlapping participant panel. The silver fix serves similar roles for silver-linked contracts as the gold fix serves for gold. Silver ETF NAV, industry contracts, and central bank silver transactions typically reference the noon fix.

What Our Site Uses

Our LBMA reading on the dashboard is the live London OTC spot quote, not the fix specifically. This is because the spot quote is available continuously while the fix is a twice-daily point-in-time snapshot. For a live premium comparison against COMEX and other markets, spot is more useful. However, if a reader needs the specific fix price for a specific historical date, ICE Benchmark Administration publishes the historical fixes going back many years; those are the reference for settlement uses that require the fix specifically.

The distinction matters because on the day the LBMA fix moves sharply (e.g., during an ECB or Fed policy announcement that coincides with an auction), the fix and the intraday spot may briefly diverge in ways worth understanding. Our spot reading follows the continuous market; a fix-referenced product may see slightly different pricing at settlement.