Gold in SAR Is Just XAU/USD × 3.75 — Here's the Peg Math

For the Riyadh-based retail trader asking whether to watch gold quoted in SAR or in XAU/USD, XAU/USD is the correct default — every time, without exception, and the math underneath is almost embarrassingly simple. The strongest counter is that domestic gold shops quote in SAR per gram and the native unit feels authoritative, which is a fair point to concede in full. SAMA has held the riyal at 3.75 against the dollar since June 1986, a peg band tighter than the XAU spread any Gulf-licensed broker publishes on its standard account. That single fact collapses the entire question into a multiplier.

The steel-man we owe this argument is real. A trader walking into a Riyadh souk sees gold priced in riyals per gram, not dollars per troy ounce. The merchant has not quoted a dollar price in a generation. For physical bullion acquisition, SAR is the authoritative unit — because the invoice, the VAT line, and the receipt all live in riyals. We concede that completely. The question we are answering is narrower: when the screen in front of you is a trading terminal, not a jeweler's scale, which quote belongs on your watchlist? That is where the peg does the work.

The Peg Does the Math — Here's the Formula Nobody Writes Out Longhand

Here is the formula written out the way nobody bothers to write it out, because once you see it you understand why nobody bothers.

Let S be SAMA's riyal peg rate against the US dollar, fixed at 3.75 SAR per USD. Let X be the loco London XAU/USD spot quote in dollars per troy ounce. Let G be the gram-weight conversion from troy ounce (31.1035 grams). The SAR price per gram of 24-karat gold, before dealer markup, is simply:

Gold (SAR/gram) = X × 3.75 ÷ 31.1035

Or, equivalently and more useful for the question in front of us:

Gold (SAR/ounce) = X × 3.75

That is the entire conversion. There is no second input. There is no second source of volatility. If XAU/USD moves one dollar, SAR gold per ounce moves 3.75 riyals. If XAU/USD doesn't move, SAR gold per ounce doesn't move. The peg is not approximate — it is institutional policy, declared and enforced by the Saudi Central Bank through its FX reserve operations. Every retail SAR quote you see on a Saudi gold-shop board or a local broker's screen is this formula, run forward, plus whatever markup the dealer charges on top.

OK so here's where it gets interesting — and this is the detail that most "gold in SAR" articles miss entirely. The implication is not that SAR tracks XAU/USD. The implication is that SAR gold IS XAU/USD, re-expressed. There is no information in the SAR quote that is not already in the dollar quote. If you watch both, you are watching the same instrument twice. The dollar quote is upstream. The riyal quote is the dollar quote with a constant applied. You cannot gain analytical edge from watching a derivative of your own input.

The counterintuitive framing most Gulf retail trading forums get backwards is this: they treat SAR gold and XAU/USD as two markets to arbitrage between. They are one market, in one currency, with a 3.75 multiplier taped to the second screen. The only edge available is in the FX leg — and the FX leg does not move.

The Spread Column on Your Broker Statement Is Still Dollar-Denominated

This is the part that trips Riyadh-based retail traders who open an account with a Gulf-regulated broker and expect their XAU costs to be quoted in riyals. They are not. Every published XAU/USD spread on every broker platform operating in the Gulf retail market is denominated in dollars, because the underlying contract is loco London bullion priced in dollars. Your statement might net to SAR when you withdraw, but the pip is a dollar pip.

Here is why that matters for the comparison question. If you are evaluating two Gulf-licensed brokers on XAU execution, the number that moves is the dollar spread — not any SAR-denominated figure. HF Markets, which holds a DFSA Category 4 license through its Dubai branch, publishes XAU/USD spreads on its MT5 platform in dollars-per-ounce terms. AvaTrade, licensed in Abu Dhabi through its ADGM FSRA registration since 2019, does the same. There is no SAR-quoted gold contract in the Gulf retail broker ecosystem. The riyal appears on the funding leg and the withdrawal leg. The trading leg is dollars throughout.

What this means practically: a trader comparing XAU execution cost across two brokers from a Riyadh desk is comparing dollar spreads, then converting the all-in dollar cost to riyals at 3.75, then (if applicable) adding the Islamic-account administration fee the broker charges on positions held overnight. The SAR step is the last step, not the first. Running the comparison in SAR introduces a conversion the peg already handled for you, and it hides the dollar-denominated spread differential that is the only variable actually worth comparing.

The deeper point — and this is where the Enthusiastic Nerd in us wants to spend a paragraph — is that the dollar denomination of the spread is not a marketing choice by the broker. It is forced by the structure of the loco London market. London bullion settles in dollars. Interbank quotes clear in dollars. The broker's liquidity provider hedges in dollars. By the time the quote reaches your terminal, three dollar-denominated legs sit between the LBMA fix and your screen. Expressing any of them in riyals would be adding a layer of translation that the trader can do mentally at 3.75 anyway.

SAMA's Peg Band Is Tighter Than Any Gulf Broker's Published XAU Spread

The Saudi Central Bank's own policy framework, published in the chapter on exchange rate arrangements in its annual report, describes the riyal's peg to the dollar as a hard fix at 3.75 maintained through standing orders at the official window. The de facto band is tighter than SAMA publicly commits to — in practice, interbank SAR/USD trades within a window measured in pips, not percentage points. For a trader comparing this to the FX cost of trading XAU through a Gulf broker, the comparison is not close.

Consider the two sources of friction between the LBMA PM fix and the net riyal cost of a round-turn XAU trade:

Read that bottom row carefully. The peg does not widen during Ramadan. The XAU spread does. That means the component of your gold trade that is denominated in SAR (the peg leg) is actually more stable than the component denominated in dollars (the spread leg). The counterintuitive conclusion follows: if you are a Saudi retail trader worried about FX risk on your gold position, you are worrying about the wrong leg. The peg risk is minuscule. The spread-widening risk during low-liquidity windows is where your actual slippage lives.

The DGCX 995 Contract Settles in Dollars for Exactly the Same Reason

The Dubai Gold and Commodities Exchange lists the DGCX 995 gold futures contract — the Gulf's deepest institutional gold reference — and the settlement currency is the US dollar. Not the dirham. Not the riyal. The dollar. This is not an oversight by DGCX. It is a recognition that every participant in the contract, from the proprietary trading desks in DIFC to the regional refiners pricing kilobars, is already running their book in dollars because loco London is in dollars.

The lesson for the Riyadh retail trader watching gold prices across quote sources: if the deepest Gulf-region gold contract in existence is dollar-settled, the quote your Saudi broker shows you on XAU is dollar-anchored by force of market structure, not by preference. Any SAR quote you see — on a jeweler's board, on a local gold shop app, on the display at a bank — is the dollar quote times 3.75, with a markup for retail convenience. The dollar quote is the primary data. The SAR quote is a UI translation.

If you have ever wondered why the Gulf gold-trading infrastructure never developed a riyal-denominated or dirham-denominated institutional contract to parallel LBMA, this is the answer. There was no demand for one. The peg made the translation free. Building a riyal-denominated contract would be building a second screen that shows the first screen's output.

What a Riyadh-Based Trader Should Actually Do With This

Delete the SAR gold quote from your watchlist. Put XAU/USD on it. If you need a SAR headline figure for a trading-journal entry or a tax-residency conversation, multiply by 3.75 at the moment you need the number — not before. The intermediate SAR quote is cognitive overhead that adds no analytical signal.

Second step. When you compare Gulf-licensed brokers on XAU execution, run the comparison in dollars-per-ounce for the spread leg, then layer the Islamic-account administration fee in dollars-per-lot-per-night if you hold positions overnight, and only convert the final all-in cost to SAR at 3.75 for your personal budget. Running the comparison natively in riyals forces you through a conversion that the peg already handled, obscures the dollar-denominated differential that actually distinguishes two brokers, and risks letting the pretty SAR number distract from the fact that the two brokers' real cost difference is a few cents per ounce in dollar terms. Those cents are the trade. Everything else is noise.

The DGCX publishes end-of-day settlement prices in dollars per troy ounce for its 995 contract. That is the number. It is published. It speaks for itself.

FAQ

Why has SAMA held the riyal at exactly 3.75 to the dollar since 1986?

The Saudi Central Bank formally adopted the current peg level in June 1986 and has defended it continuously through FX reserve operations. The rationale is twofold: the Kingdom's oil export revenue is dollar-denominated, so pegging to the dollar removes a layer of volatility from the state's primary income stream, and a hard peg at a round-number level reduces speculative pressure. In practical terms the band is tighter than any Gulf broker's published XAU spread.

Can I trade a SAR-denominated gold contract through any Gulf-licensed broker?

No. Every XAU/USD contract offered by DFSA-licensed, ADGM-registered, or SCA-regulated brokers in the Gulf retail market is denominated in dollars per troy ounce, because the underlying is loco London bullion. The riyal appears on the funding and withdrawal legs — not on the pricing leg. If you see a broker advertising a "SAR gold" instrument, verify what the pip currency actually is in the contract specifications before funding.

Does the peg ever break during periods of oil-price stress?

Not in the modern record. Speculative pressure on the riyal has occurred — notably during the 2016 oil-price collapse — but SAMA has defended the 3.75 level through FX reserve interventions each time. The reserves are large enough and the political commitment firm enough that the peg has become a baseline assumption in Gulf financial market structure. Short-dated forward points have widened in stress episodes without the spot peg breaking.

How does the troy-ounce-to-gram conversion affect the SAR calculation?

One troy ounce equals 31.1035 grams. For a 24-karat gram price in SAR, the formula is XAU/USD × 3.75 ÷ 31.1035. For a 22-karat gram price — common in Saudi retail jewelry pricing — multiply the 24-karat SAR gram price by 22/24, then add the dealer's making charge. The making charge is where retail jewelers extract margin; the raw metal value is deterministic from the dollar spot.

If I hold XAU overnight on a swap-free Islamic account, how is the cost expressed?

Broker administration fees on swap-free accounts for XAU positions are typically published in dollars per lot per night, regardless of whether the account is funded in SAR, AED, or USD. The dollar figure is converted to your base currency at the broker's internal rate — which, for SAR-funded accounts, will track the 3.75 peg closely. Check your broker's current fee schedule rather than relying on general figures; swap-free terms have shifted across the industry in recent years.

Should I convert at the exact 3.75 peg rate, or at my bank's SAR/USD rate when calculating all-in cost?

For analytical purposes — comparing broker spreads, modeling P&L, deciding what to put on your watchlist — use 3.75 flat. For actual settlement cost, use your bank's quoted retail SAR/USD rate at the moment of funding or withdrawal, which will include the bank's retail FX markup over the interbank peg. The gap between the two is small but non-zero and lives entirely in the retail bank's margin, not in the peg itself.

Does gold priced in SAR move during Saudi weekend hours when XAU/USD markets are closed?

No. SAR gold is a derived quote, so it only updates when the primary dollar market updates. Saudi gold shops that display SAR prices on Friday — the local weekend — are showing the last-available dollar quote converted at 3.75, held static until global markets reopen. Any "move" you see in a shop window on Friday is a markup adjustment, not a price change. The underlying is frozen until the London session returns.