Last year's transactions totaled $14.4 billion, up 54% from 2014.

Marriott hedges against continuing strength in the dollar, only to see U.S. currency slump.

AIG, BNY Mellon and BB&T unit sought to save $1.5 billion.

The Fed isnt likely to push U.S. rates below zero, but treasurers of multinationals still have to cope with negative rates overseas.