SINGAPORE/LONDON (Reuters) -Global credit markets began to come under fire on Monday, driving the cost of insuring against corporate and sovereign default higher, as recession fears rippled across equities, commodities and currencies. Trillions of dollars have been wiped off global stock markets in the last three days, as investors have taken fright at the range and severity of the tariffs unveiled last week by U.S. President Donald Trump. Fears of a sudden global recession have hit asset markets hard and credit, which is often seen as a warning sign that a deeper downward correction may be approaching, is starting to show the strain.