The US treasury will auction off $22 billion of 30 year bonds at the top of the hour. On Monday the coupon auctions for the week was started with the sale of three year note. That auction did not go well with a positive tail (rate above the WI level at the time of the auction) and light bid-to-cover support.
On Tuesday, the 10 year auction was the complete opposite with a negative tail and stronger than the average bid to cover data.