The vocabulary of the Gold Price API

The 10 fields and concepts you'll meet in the response — defined in plain English, each with a real example value.

10 terms
Pricing Basics1

Spot Price

The current market price at which an asset (like gold or silver) can be bought or sold for immediate delivery.

Spot prices are determined by active trading on commodity exchanges and change constantly during market hours. They represent the "cash" price for physical metal delivered within 1-2 business days. Spot prices exclude premiums, shipping, or fabrication costs.

ExampleGold spot price: $2,634.50 per troy ounce

Measurements2

Troy Ounce

The standard unit of measurement for precious metals, equal to 31.1 grams (slightly heavier than a regular ounce at 28.35g).

Troy ounces (ozt) are used exclusively for precious metals, while regular ounces (oz) measure other goods. This distinction is crucial—buying "one ounce" of gold means one troy ounce. For jewelry weight in grams, divide price per troy ounce by 31.1.

Example1 troy ounce = 31.1 grams, 1 regular ounce = 28.35 grams

Karat (Gold Purity)

A measure of gold purity, with 24 karat being pure gold (99.9%+) and lower karats indicating gold alloys.

24k = 99.9% pure gold. 18k = 75% gold (18/24). 14k = 58.3% gold. Jewelry is typically 14k or 18k for durability. Investment gold is 24k. To calculate gold value: item weight × karat purity × current gold price per gram. Lower karat pieces have less gold content and lower melt value.

Example18k gold ring: 75% pure gold, 25% alloy metals for strength

Trading Instruments1

Futures

Contracts to buy or sell an asset (like gold) at a predetermined price on a future date.

Futures allow investors to lock in prices or speculate on future movements. Gold futures trade on COMEX with standard contract sizes (100 troy ounces). Futures prices include storage and interest costs (contango) or discount (backwardation). Most investors reference spot prices, not futures.

ExampleGold Dec 2025 futures at $2,680 (vs spot $2,634)

Market Ratios1

Gold-to-Silver Ratio

The number of ounces of silver required to purchase one ounce of gold.

Calculated as: Gold price ÷ Silver price. Historical average is 60-70:1. Ratios above 80:1 suggest silver is undervalued relative to gold (or gold is overvalued relative to silver). Investors may trade the ratio: buy silver when ratio is high, buy gold when ratio is low.

ExampleGold: $2,634, Silver: $30 → Ratio: 87.8:1

Investment Concepts3

Volatility

The degree of price fluctuation over time, measured as standard deviation or percentage change.

Higher volatility means larger price swings. Silver is 2-3x more volatile than gold, making it riskier but offering greater potential returns. Volatility impacts investment decisions: conservative investors prefer low volatility (gold), while traders seek high volatility (silver) for profit opportunities.

ExampleGold daily volatility: 1-2%, Silver daily volatility: 3-5%

Safe-Haven Asset

An investment that retains or increases value during economic turmoil and market downturns.

Gold is the classic safe-haven—investors flock to it during crises, wars, or financial instability. When stock markets crash, gold often rises. This inverse relationship makes gold valuable for portfolio diversification. Silver also has safe-haven characteristics but is more volatile due to industrial demand.

ExampleDuring 2008 crisis, stocks fell 50%, gold rose 25%

Inflation Hedge

An asset that maintains or increases purchasing power when currency values decline due to inflation.

Precious metals historically preserve value during inflation. As currency depreciates, the price of gold in that currency rises, maintaining real purchasing power. This makes gold popular during periods of high inflation or currency devaluation. However, gold doesn't always rise with inflation in the short term.

ExampleDuring 1970s inflation, gold rose from $35 to $850/oz

Physical Metals2

Bullion

Precious metals in bulk form, typically bars or ingots, valued by weight and purity rather than form.

Bullion is the purest form of investment metal. Gold and silver bars are cast at .999 or .9999 fineness. Bullion trades at small premiums (1-3%) over spot price. Coins are also considered bullion if valued for metal content rather than rarity. Bullion is the most cost-effective way to own physical metal.

Example1 oz gold bullion bar, 10 oz silver bar, American Gold Eagle coin

Premium

The amount above spot price that buyers pay when purchasing physical precious metals.

Premiums cover: fabrication costs (minting coins, casting bars), distribution and dealer margins, and supply/demand for specific products. Premiums range from 1-3% for large bars to 5-15% for small coins. During high demand, premiums spike. Premiums are lost when selling back (you receive near spot price).

ExampleGold spot: $2,634, 1 oz coin purchase price: $2,710 (3% premium)

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