in an interview bill gross says he never shorted treasuries as rumored. he utilized swaps which were mis-taken as shorts in their reporting.
many think it doesnt matter what he calls that transaction since he lost money in it no matter what by betting against them and being wrong..
if you dont know what these credit default swaps are they are in their simplest form a side bet that someone will or wont get paid off.
if a client owes a bank 500k and the client doesnt pay, the bank is out 500k. but suppose investors and insurance companies all around the world could make a side bet of hundreds of millions as to whether or not that bank gets paid off? thats a swap.
it may not be actually shorting the market but its still a short in nature no matter what bill calls it.
Bill Gross Isn