US TSYS/SUPPLY: WI 5Y

* The 5Y WI up to 4.987% from 4.967% earlier - highest since July 2006 - and 59.4bp cheap to last month's tail: 4.393% high yield vs. 4.392% WI. * Auction headwind: another tail today will make it 16 in a row. Near term risks include doubts over diplomatic solution to US/Iran war underpinning crude prices.