Lots of new supply: Treasury debt of notes and bonds outstanding ballooned by $70 billion this week. By Wolf Richter for WOLF STREET. The US government sold $743 billion of Treasury securities during the week, in 10 auctions. Of them, $612 billion were Treasury bills, spread over seven massive auctions, with maturities from 4 weeks to 52 weeks, most of them to replace maturing T-bills. And $131 bi...