Yet Another Reason to Hate Bankers

YET ANOTHER REASON TO HATE BANKERS....Headline from the Wall Street Journal tonight:

Twin Risks for Treasurys in Year Ahead

This is the second time I've seen this in the past couple of days, and I don't remember seeing it before. Is the plural of treasury really treasurys? Shouldn't it be treasuries?

Via Google, I see that both forms are fairly common. But why? Where did treasurys burble up from? Is Wall Street, not content merely to ruin our economy, now taking a crack at ruining the English language too?