Shanghai vs London
The Shanghai Gold Exchange and the London Bullion Market are the two largest physical gold venues on the planet. The spread between the SGE benchmark and the LBMA Gold Price is the cleanest single indicator of east-west gold flows — positive spread means bars are likely moving east, negative spread west. This page covers what the spread is, why it exists, and how to read it for institutional positioning clues.
Two physical markets, two roles
London is the world’s primary OTC bullion settlement venue. The vast majority of cross-border gold settlement — central bank transfers, ETF custody changes, refiner-to-refiner sales — clears through LBMA member banks, settled in unallocated credits backed by physical metal in London vaults.
Shanghai is the world’s primary physical-acquisition venue. Chinese banks, refiners, jewelers, and industrial buyers source physical kilos through SGE for actual end use. SGE is also where People’s Bank of China (PBOC) and other Asian central banks source domestic-currency gold purchases.
The SGE/LBMA spread therefore reflects the relative tightness of physical supply in the two main consumption regions. When SGE is at a sustained premium, gold tends to flow east; when at a discount, flows can reverse.
East-west gold flow mechanics
The standard arbitrage path: refiner takes 400-oz London Good Delivery bars from an LBMA vault, ships them to Switzerland for re-melting and re-casting into 1kg SGE-spec 99.99% bars, ships to Shanghai, sells into SGE. Total cycle time is several weeks; spread needs to cover transport, insurance, re-refining, and capital cost (typically ~$2-4/oz minimum).
When the SGE/LBMA spread sustains above ~$5/oz for weeks, this arbitrage runs hard, and you can observe the effect in two lagging indicators: declining London vault holdings (LBMA monthly report) and increasing SGE withdrawals (SGE weekly report).
The reverse flow is rare. Chinese capital controls and the 13% silver VAT make exporting metal from China to London economically unattractive in most market conditions, even when the spread inverts.
What the spread says about positioning
A sustained SGE premium above LBMA is one of the most reliable indicators of strong Asian institutional and PBOC gold demand. It’s often visible months before central-bank gold purchase data is officially released, since the physical flow precedes the reported balance-sheet entry.
A compressed or negative spread, especially during peak Chinese demand season (Lunar New Year run-up), can signal weakness in the Chinese consumer market or sufficient inventory to meet anticipated demand.
Watch the spread alongside LBMA vault changes (monthly) and SGE withdrawals (weekly) for triangulation. Single-source signals can mislead; the three together rarely do.
Frequently asked questions
- How are SGE and LBMA different?
- The Shanghai Gold Exchange (SGE) is a physical spot market focused on real metal delivery within China. The London Bullion Market Association (LBMA) operates the largest OTC bullion market in the world, where institutional participants trade unallocated and allocated gold and silver, with the LBMA Gold Price (formerly the London Fix) set twice daily as a global benchmark. SGE is volume-led; LBMA is liquidity- and benchmark-led.
- Why does the SGE/LBMA spread matter?
- London is the world's primary gold settlement venue, and most international gold movements clear through London. When SGE trades at a premium to the LBMA fix, gold tends to flow east — refiners, banks, and importers move bars from London vaults to Shanghai to capture the spread. Sustained spread divergence is the cleanest indicator of cross-border institutional gold flows.
- What does it mean when SGE is below LBMA?
- A negative spread (rare for gold) usually means oversupply in China — too much physical metal sitting in SGE warehouses relative to demand. It's often associated with weak Chinese economic conditions or post-festival demand lulls. Sustained negative spread can trigger metal flowing back from China to Western markets.
- Are SGE Au99.99 and LBMA Good Delivery interchangeable?
- Different specifications. SGE Au99.99 is 1kg bars at 99.99% purity. LBMA Good Delivery is 400-oz (~12.4kg) bars at 99.5% minimum purity. Bars must be re-melted and re-cast to move between specifications, which is part of why physical arbitrage between the two markets is dominated by a small number of accredited refiners.
- How does the LBMA Gold Price relate to spot?
- The LBMA Gold Price is set via electronic auction at 10:30 AM and 3:00 PM London time and is widely used by central banks, ETFs, and refiners as a benchmark for valuation, settlement, and contracts. It's typically very close to spot at the auction times, but the auction-derived price is more authoritative because it represents an actual cleared price between major institutional participants rather than an indicative quote.
- How does the spread react to LBMA vault changes?
- LBMA reports vault holdings monthly with a ~4-week lag. Sharp drops in London vault gold (especially when not explained by ETF outflows) often correlate with sustained periods of SGE/LBMA spread, as the inferred destination is China. Combined with weekly SGE gold withdrawals, you can build a high-confidence picture of cross-Pacific gold flow.
