Dollar near one-week high as markets grapple with Gulf tensions

The U.S. dollar index held steady near 100.96, close to its highest level since July 15, as Middle East tensions kept markets volatile. Oil prices swung sharply near six-week highs after Yemen's Houthis declared a naval blockade on Saudi Arabia, raising fears of supply disruption. U.S. Treasury yields remained elevated with the 10-year at 4.59 percent and 30-year above 5 percent, while the ECB is expected to keep rates unchanged this week though high oil prices are fueling bets of a September hike.