As the tide rises, a flood-tidal current moves in one direction and as the tide falls, the ebb-tidal current moves in the opposite direction.

UNESCO: L O S S A R Y

Ebb-tidal current: flow of water in a given direction that takes place between high water and low water.

UNESCO: L O S S A R Y

After all, foreign private-portfolio investments in the U.S. ebb and flow with the emotional current, no easy factor to predict.

FORBES: No Greenback Crash