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If Everything Moves at the Speed of Light, Why Is My Money So Slow?

New fiber optic wires can carry a two-hour movie in 31 millionths of a second. Hedge funds already make trades in a fraction of that time. And when you pay a bill online, money disappears from your account at high velocity.

So why does money take so long to appear in your account? Why, when you want to move cash from one account to another, is it faster to walk it there -- even if it's a really long walk?