Dear John: How Bill Ackman's Herbalife plan works

Dear John : I have been following investor Bill Ackman's short position on Herbalife for some time now. Recently, the Federal Trade Commission settled a probe into Herba­life without finding it a pyramid scheme, putting Ackman's $1 billion short in jeopardy. My question is this: When does Ackman lose his $1 billion? Herbalife stock is...