Forex Slang

Fiber

Forex slang for the EUR/USD currency pair, the most traded pair in the world.

Definition

Fiber is a modern nickname for EUR/USD, the world's most traded currency pair. The name references fiber optic cables used for modern price transmission, contrasting with the older "Cable" (GBP/USD) nickname from telegraph days.

How It Works

"Buying Fiber" = going long EUR/USD
"Selling Fiber" = going short EUR/USD
Most liquid currency pair - tightest spreads
Accounts for ~24% of daily forex volume

Trading Tips

Most active during London-New York overlap

Sensitive to ECB and Fed policy decisions

Lower volatility than Cable typically

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