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Commodities

Why Gold Rises When Central Banks Buy: Reserve Diversification Explained

Central banks bought 863.3 tonnes of gold in 2025 to diversify reserves, not to time the price. See how that supports gold and what it means for XAUUSD.

Piotr NiemidomskiCo-Founder & COO, Vanto
October 10, 202615 min read

Educational content. This article explains why central bank gold purchases are linked to higher gold prices and what that link does and does not tell a CFD trader. It does not constitute investment advice or a recommendation. CFD trading carries significant risk of loss and may not be suitable for all investors.

Gold tends to rise when central banks buy because they add gold to their reserves to diversify away from other governments' currencies and debt, and they do so to reach a target share of reserves, not to chase a price. The World Gold Council counted 863.3 tonnes of net central bank buying in 2025. That is steady, price-insensitive demand, but it supports gold and does not time it.

This article covers the reserve diversification mechanism, the 2025 flow figures, a conversion of those tonnes into CFD lots, and where the link fails. Figures from the World Gold Council are dated and sourced. Figures from the Vanto feed are arithmetic on a snapshot, not forecasts.

Why Do Central Banks Buy Gold?

Central banks buy gold to diversify reserves: gold is the one major reserve asset that is not a claim on another government. A reserve of US Treasuries is a claim on the US government. A reserve of euros is a claim on the eurozone. Gold has no issuer, no coupon and no credit rating, so it cannot default and cannot be frozen by the country that issued it in the way a bond held in custody abroad can.

Three motives sit behind most purchases:

  • Diversification. Reserves are held to be usable in a crisis. Spreading them over more assets, including one with no counterparty, lowers the damage if any single currency or custodian becomes a problem.
  • Crisis performance and store of value. Gold has historically held purchasing power across long periods and often moved differently from bonds and equities in stress. This is a statement about the past, not a promise.
  • Sanctions and custody risk. In February 2022 the G7 countries and partners immobilised a large part of the Russian central bank's foreign-currency reserves held in their jurisdictions. Gold kept in a country's own vaults is not exposed to that kind of measure, which is one reason a reserve manager may hold part of the reserves that way. Whether this drove any given purchase is a matter for the central bank concerned.

The key point for pricing is that none of these motives depends on the price of gold. A central bank deciding to raise gold from 7% of reserves to 10% is making a portfolio allocation, not a trade.

How Much Gold Did Central Banks Buy in 2025?

Central banks and other official institutions bought 863.3 tonnes of gold in 2025, according to the World Gold Council's full-year 2025 central bank report. That was 21% below 2024, but still far above the long-run norm.

Period Net central bank purchases Source note
2010-2021 average 473 tonnes a year World Gold Council
2022, 2023 1,082 and 1,037 tonnes World Gold Council (2022 as revised in later reports)
2024 1,092.4 tonnes World Gold Council
2025 863.3 tonnes World Gold Council
Q4 2025 230 tonnes World Gold Council, up 6% on Q3 2025

Source: World Gold Council, Gold Demand Trends full-year 2025, central banks section; 2022 and 2023 from the World Gold Council's Gold Demand Trends full-year 2023 report and later revisions.

Two details in the same report matter for anyone using the figures. First, 57% of the 2025 total was unreported buying: the World Gold Council's annual figure includes an estimate for purchases that central banks have not published, on top of the public disclosures. Second, the share that was publicly reported is therefore about 43% of the total, roughly 370 tonnes, so the reported-only tally and the full estimate measure different things. Check which one a source quotes before comparing years.

The largest named buyers in 2025 were the National Bank of Poland at 102 tonnes (the largest buyer for a second year running), the National Bank of Kazakhstan at 57 tonnes, the Central Bank of Brazil at 43 tonnes and the People's Bank of China at 27 tonnes, as reported in the World Gold Council release; some national figures cover only part of the year. The Monetary Authority of Singapore was among the sellers at 15 tonnes.

How Big Is That in CFD Lots?

One tonne of gold equals about 321.5 lots of XAUUSD, so 863.3 tonnes of buying equals about 277,557 lots. The conversion uses 32,150.7 troy ounces per tonne and the 100-ounce contract size in the Vanto feed. Contract size is explained in what is contract size in trading.

The table prices each flow at the spot level in the feed. It is a unit conversion, not a statement of what central banks paid.

Flow Tonnes Troy ounces XAUUSD lots (100 oz) Value at feed price, USD
2010-2021 yearly average 473 15.21 million 152,073 63.8 billion
2024 1,092.4 35.12 million 351,214 147.3 billion
2025 863.3 27.76 million 277,557 116.4 billion
Q4 2025 230 7.39 million 73,947 31.0 billion
Poland, 2025 102 3.28 million 32,794 13.8 billion

Sources: tonnes from the World Gold Council. Ounce, lot and value columns computed on the Vanto feed snapshot, 10 October 2026, with XAUUSD at 4,194.38 (bid) and a contract size of 100.

Worked arithmetic for 2025: 863.3 tonnes x 32,150.7 oz = 27,755,740 oz. Divided by 100 oz per lot, that is 277,557 lots. At USD 4,194.38 an ounce, 27,755,740 oz is about USD 116.4 billion. Spread over 365 days, it is 863.3 / 365 = 2.37 tonnes a day, about 760 lots a day.

The comparison is not that a CFD trader can match a central bank. It is that a buyer working in tonnes toward a reserve target is a different kind of participant from a leveraged account working in lots toward a profit.

Why Does Reserve Buying Support the Gold Price?

Central bank buying supports gold because it is a steady source of demand that does not fall when the price rises. Most gold buyers weigh price. A reserve manager with a tonnage or share target weighs the target.

Three features give that demand its effect:

  1. It is target-based. Poland states a reserve target (gold at 28% of reserves, against a revised target of 30%) and the Czech National Bank has a 2028 target of 100 tonnes against 72 tonnes held, according to the World Gold Council. A buyer filling a target keeps buying through price rises, which a return-driven buyer would not.
  2. It is persistent. Purchases averaged 473 tonnes a year in 2010 to 2021 and were above 1,000 tonnes in 2022, 2023 and 2024 (World Gold Council), so this demand has been present for over a decade and not only in one year.
  3. It is large against flows, not against the stock. 863.3 tonnes is a large annual flow. Against all the gold ever mined it is small, so the mechanism works through the marginal buyer and the pace of buying, not through scarcity alone.

Compare the buyer types that set the gold price at the margin:

Buyer Decision driver Price sensitivity Horizon Visibility of flows
Central bank Reserve share or tonnage target Low Years Delayed, partly unreported
ETF investor Real yields, dollar, sentiment High Weeks to months Daily holdings
Jewellery and bar buyer Price level, income, seasons High Annual cycle Quarterly surveys
CFD trader Price moves over hours to days Very high Intraday to weeks Not aggregated

The table is a simplification, but it shows why the buyer mix matters. A price-insensitive buyer can weaken the link between gold and the usual inputs. Real yields rose sharply in 2022 and 2023 without gold falling (see the real yield article), and central bank buying was above 1,000 tonnes in both years, but this article does not claim one caused the other. The gold and DXY article covers the dollar side.

Does Central Bank Buying Cause Gold to Rise?

No, central bank buying supports gold but does not on its own cause a price rise. The evidence is mixed, and the 2024 and 2025 figures show it.

Central bank buying fell 21% in 2025 from 2024. Gold nonetheless rose 67% over the calendar year, a multi-decade record, and closed 2025 at USD 4,368 an ounce, according to the World Gold Council's December 2025 market commentary. Falling official demand with a rising price means other buyers set the price in 2025. This article does not attribute the rally to any one cause.

The direction of the relationship is also unclear. Central banks may buy more because gold has become a better-known reserve asset, because geopolitical risk rose, or because they expect a higher price. Buying and price can both respond to a third factor. This is why the article's title describes a tendency and not a rule.

For a view of how published forecasts treat central bank demand, see gold market predictions, which dates each institution's assumption.

The link between central bank buying and the gold price breaks in four recurring ways.

Liquidity crises. In a panic, every holder sells whatever is liquid, and gold can fall with equities. The break is usually short, and central bank buying does not stop it.

Slower buying. Official demand can fall while the price keeps rising, as in 2025. A price rise that rests on other buyers can reverse without official demand changing.

Lumpy and delayed data. Quarterly totals swing widely, and a large share is reported late. A trader reading the latest quarter as a trend can be wrong about the annual pace. Because 57% of the 2025 total was unreported buying, the market often learns of a purchase long after it happened.

One buyer, not all. The 2025 total is concentrated in a few buyers. The fall of one large buyer, or a pause by it, changes the total without any change in the reserve diversification trend.

None of these says that central bank buying has stopped mattering. They say it is a floor-like influence on a long horizon, not an input that predicts the next session.

What Does This Mean for a Gold CFD Trader?

For a CFD holder, central bank buying is background context on a horizon of years, while the position is exposed to price moves in hours and days. The mechanism cannot be traded directly because the flows are slow and reported late. It matters through volatility, margin and holding cost.

Margin and Leverage

XAUUSD on Vanto is a CFD on spot gold with a contract size of 100 troy ounces per lot, and the maximum leverage on the metals class is 1:500. The margin call level is 100% and the stop-out level is 50%. Spot versus futures pricing is covered in what is spot vs futures gold.

At the feed snapshot price of USD 4,194.38, the required margin at 1:500 is price x contract size x lots / 500:

Position Notional, USD Margin at 1:500, USD P/L per USD 1 move, USD
0.01 lot 4,194 8.39 1
0.1 lot 41,944 83.89 10
1 lot 419,438 838.88 100
5 lots 2,097,190 4,194.38 500

Source: Vanto feed snapshot, 10 October 2026. XAUUSD at 4,194.38, contract size 100, margin = notional / 500.

Worked example with illustrative numbers: a USD 1,000 account holds a 0.1 lot long. Margin is 4,194.38 x 100 x 0.1 / 500 = USD 83.89. The margin call level is reached when equity falls to 100% of margin, a loss of 1,000 - 83.89 = USD 916.11, which at USD 10 per dollar of price is a fall of USD 91.61 an ounce (2.18%). The 50% stop-out is reached at a loss of 1,000 - 41.94 = USD 958.06, a fall of USD 95.81 an ounce (2.28%).

A 2% move in gold is a normal-sized event, and it is far smaller than the multi-year reserve trend described above. Leverage amplifies losses as well as gains. What is margin in trading and what is the stop-out level explain the mechanics.

Swap and Holding Cost

A CFD on gold held overnight carries a swap, a financing charge or credit explained in what is swap in trading. Structurally, in the Vanto feed snapshot of 10 October 2026 the XAUUSD swap for long positions is negative and the swap for short positions is positive, and the triple-swap day is Wednesday, explained in what is a triple swap day. Rates can change, so check the live figures in the calculator.

The point for this topic is the mismatch in horizons. A central bank holds for years and pays no financing. A CFD position that tries to hold gold for the same reason pays or receives a swap every night, so the long-term thesis and the holding instrument do not match. Volatility, the third cost, is covered in what is volatility in trading.

Where Central Bank Data Fits

Central bank figures give context, and the dates to know are the World Gold Council's quarterly Gold Demand Trends releases and the monthly central bank statistics. Short-term gold moves around scheduled macro events are covered in how US CPI day moves gold and silver. For the sessions when gold is most active, see best trading sessions for gold. A general introduction is trading gold for beginners.

Common Mistakes When Reading Central Bank Gold Data

  • Treating a quarter as a trend. Quarterly tonnage swings widely and is revised, so one strong or weak quarter says little about the annual pace.
  • Comparing reported and total figures. The publicly reported part of the 2025 purchases and the 863.3 tonnes total estimate measure different things.
  • Reading buying as a price signal. Reserve buying follows targets. A buyer filling a target does not need a lower price, and a price rise does not stop it.
  • Ignoring the other buyers. In 2025 official buying fell while the price rose strongly, so ETFs, investors and other demand moved the price.
  • Matching the thesis to the wrong instrument. A years-long reserve story does not fit a leveraged position that can be closed out by a move of about 2% at small account size.

Frequently Asked Questions

Why do central banks buy gold?

Central banks buy gold to diversify their reserves into an asset that is not another government's liability. Gold has no issuer, so it carries no default risk, and it can be held in the country's own vaults. The buying is usually aimed at a target share of reserves or a target tonnage.

Which central banks buy the most gold?

In 2025 the National Bank of Poland was the largest named buyer at 102 tonnes, ahead of Kazakhstan at 57 tonnes, Brazil at 43 tonnes and China at 27 tonnes, according to the World Gold Council. Because 57% of the 2025 total was unreported buying, the named ranking is incomplete.

Does gold always go up when central banks buy?

No. In 2025 central bank buying fell 21% from 2024 while gold rose 67% over the year, so price and official demand did not move together year by year. Central bank buying acts as steady support on a long horizon, not as a short-term driver.

How many tonnes of gold did central banks buy in 2025?

Central banks and other official institutions bought 863.3 tonnes in 2025, down from 1,092.4 tonnes in 2024 and above the 2010-2021 average of 473 tonnes, according to the World Gold Council. About 57% of the 2025 total was unreported buying, so the publicly reported part is smaller.

Can a CFD trader trade central bank gold buying?

Not directly. Central bank flows are slow, reported late and partly unreported, so they do not give timing information for a position held for hours or days. A trader can treat them as background context, while margin, leverage and swap determine the risk of the actual position.

How is a tonne of gold measured in XAUUSD lots?

One tonne is about 32,150.7 troy ounces, and one XAUUSD lot on Vanto is 100 ounces, so a tonne equals about 321.5 lots. At the feed snapshot price of USD 4,194.38 a tonne has a value of about USD 134.9 million.

Calculate the Numbers Before You Trade

Margin, swap and spread for XAUUSD change with the price and the account, so check the live figures in the trading calculator before sizing a position. Central bank demand is context, and leverage amplifies both gains and losses.


Risk warning. Trading securities, futures, options, and contracts for differences are complex financial instruments that require knowledge and understanding. Prices can fluctuate significantly and securities may become valueless. Investors may incur losses exceeding the potential for profits. Trading on margin can result in losses greater than the amount initially deposited. Past performance is not necessarily a guide to future performance. The information in this article is for educational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any financial instrument. Consider whether CFD trading is appropriate for your circumstances and seek independent advice if necessary.

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