Market sessions
Sydney
Tokyo
London
New York
Market status
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

1

Most active during London-New York overlap

2

Sensitive to ECB and Fed policy decisions

3

Lower volatility than Cable typically

Back to Glossary
Start Trading

Put Your Knowledge Into Practice

Compare regulated brokers and find the best one for your trading style.

No partnership

We don't work with this broker.

We review them, but we have no commercial relationship and won't hand them the click. Here's who we do work with.

Compare every broker we rate