GC vs. MGC: Gold Futures Volatility, Tick Value, and Sizing

GC and MGC trade the same gold market, but GC carries ten times the contract exposure. COMEX Gold futures represent 100 troy ounces, while Micro Gold represents 10 troy ounces. That difference determines how quickly a normal gold move turns into a large dollar gain or loss.

Gold contract math

GC is quoted in U.S. dollars per troy ounce. A minimum price change of $0.10 per ounce equals $10 for one 100-ounce GC contract. A full $1.00 move equals $100.

MGC also moves in $0.10 increments, but the 10-ounce contract makes each minimum tick worth $1. A full $1.00 gold move equals $10. MGC is therefore one-tenth the size of GC.

Why gold requires volatility-aware stops

Gold can accelerate around inflation data, employment reports, central-bank communication, geopolitical headlines, currency moves, and changes in interest-rate expectations. A stop that looks large compared with an equity-index setup may still be normal for current gold volatility.

The trader should define the structural invalidation first and then convert the dollar distance into contract risk. If the stop is $6.00 away, one GC contract risks about $600 before costs. One MGC contract risks about $60.

Position-sizing formula

1. Identify the entry and invalidation price in gold dollars per ounce.
2. Subtract the prices to calculate the stop distance.
3. Multiply the distance by $100 for GC or $10 for MGC.
4. Add estimated transaction costs and slippage.
5. Choose the number of contracts that fits the maximum planned loss.

Example: entry at 2,450.0 with invalidation at 2,444.5 creates a $5.50 stop. One GC risks about $550. One MGC risks about $55. Three MGC contracts would risk about $165 before costs.

Why MGC can improve execution discipline

• It permits technically wider stops at a smaller dollar amount.
• It allows multiple targets without requiring a large account.
• It can reduce the pressure to move a stop prematurely.
• It can help prop traders fit gold exposure inside a daily loss limit.
• It allows size to be reduced during major news or elevated volatility.

Do not confuse smaller with harmless

Ten MGC contracts create roughly the same price exposure as one GC contract. A trader who repeatedly adds micros can exceed the intended risk just as easily as a trader who starts with the standard contract. Gold can also gap or slip through orders during fast conditions.

Contract-selection rule

Use GC only when the account can comfortably hold the structural stop and the planned risk remains small relative to available loss capacity. Use MGC when the same setup needs more granular sizing. If neither contract fits, the correct position is zero.

Gold does not care which contract feels affordable. Size the move in dollars before the order is placed.

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