Synthetic pairs and futures-based replication

[Shadow Trader]

Some traders build synthetic positions by combining other instruments, such as trading EURUSD and USDJPY to create a EURJPY position. Others use futures contracts to replicate currency exposure at a different cost structure.

The appeal of synthetics: access to a view without a wide spread on the cross, or avoidance of a broker restriction on a particular pair. The drawback: double the transaction costs, two sets of execution risks, and legs that may fill at slightly different times.

Futures bring their own details: contract expiry, margin rules, different trading hours, and tick sizes that don't match spot pips. Their transparency on volume and depth attracts many, though costs and capital requirements differ from a retail spot account.

Whatever the route, the true measure is all-in cost compared with a direct trade, and the operational complexity of managing it.

For the curious, pay attention to the basis between futures and spot as expiry approaches, and to the quarterly roll dates. A synthetic built from futures that's about to expire behaves differently from one built on the next contract, and the roll itself can introduce a price jump that has nothing to do with the market.

Liquidity also differs: front-month contracts are deep, deferred ones thin. Any plan that relies on futures needs to track which contract is the active one.

Has anyone replicated a position synthetically, and did the cost savings survive real execution?