Key TakeawaysMajor US equity indices declined Monday amid surging crude prices driven by escalating Middle East tensionsBrent crude climbed past $90 a barrel following Trump’s warnings regarding the Strait of Hormuz and OmanThe 30-year Treasury note yield reached 5.31%, marking its peak since June 2007Futures contracts extended losses during Asian hours Tuesday, with tech-heavy Nasdaq futures sliding 0.8%Major retail sector reports from Walmart, Target, and Home Depot expected this week alongside Wednesday’s FOMC minutes releaseWall Street finished Monday’s session in negative territory as surging energy prices and elevated bond yields weighed on investor sentiment. Market participants grew increasingly concerned following the lapse of a diplomatic understanding between Washington and Tehran, fueling anxiety about potential military escalation.The Dow Jones Industrial Average retreated 0.5%, while both the S&P 500 and Nasdaq Composite posted losses of 0.5% and 0.3% respectively. The S&P 500’s decline snapped a three-week rally that had buoyed market sentiment.E-Mini S&P 500 Sep 26 (ES=F)Brent crude contracts pushed beyond $90 per barrel during Monday’s session before advancing past $91 in Tuesday trading. The rally intensified after President Trump indicated that hostilities with Iran would likely persist for an extended period.The president further escalated rhetoric by warning Oman against any interference with maritime passage through the Strait of Hormuz. This critical waterway handles a significant portion of global petroleum transport, meaning any blockage could severely impact worldwide energy markets.BREAKING: President Trump threatens to bomb Oman if they "get in the way" of US efforts to reopen the Strait of Hormuz and end the war with Iran."If Oman gets in the way, we'll bomb the s*** out of them," President Trump said.— The Kobeissi Letter (@KobeissiLetter) August 17, 2026Reports from Iranian state media indicated that Tehran had detained an oil tanker owned by UAE interests, further intensifying regional instability. The development maintained downward pressure on equity markets as investors evaluated the possibility of broader conflict.Bond Yields Reach Heights Unseen in Nearly Twenty YearsEnergy sector stocks proved to be the sole gainers within the S&P 500 on Monday, advancing 0.9%. Meanwhile, most other sectors posted declines, with communications services and consumer staples leading the retreat.Climbing oil prices contributed to upward momentum in Treasury yields. The 30-year bond yield advanced 5 basis points to settle at 5.31%, representing its strongest close since June 2007. The benchmark 10-year note yield similarly edged higher.Elevated energy expenses have rekindled concerns regarding inflationary pressures. This development could constrain the Federal Reserve’s ability to implement interest rate reductions, adding complexity to monetary policy planning.The central bank maintained its policy rate within the 3.50% to 3.75% range following its July 28-29 deliberations. However, the decision revealed internal disagreement, with three committee members favoring a rate increase instead.Retail Sector Reports and Central Bank Minutes Take Center StageEquity futures extended their decline during Tuesday’s Asian trading hours. S&P 500 contracts fell 0.4%, Nasdaq 100 futures declined 0.8%, while Dow Jones futures slipped 0.1%.Market attention now shifts toward a critical week of retail sector earnings announcements. Major chains including Walmart, Target, and Home Depot are scheduled to unveil their quarterly performance.These financial disclosures should provide valuable insight into the current state of American consumer health. Recent July data showing softer-than-anticipated retail sales and employment figures have sparked questions about consumer spending momentum.Minutes from the Federal Open Market Committee’s latest gathering are slated for release on Wednesday. These documents should offer additional perspective on policymakers’ internal discussions regarding the trajectory of interest rates.Both the corporate earnings releases and the Fed minutes will be scrutinized carefully by traders seeking guidance for positioning through the remainder of August.The post Treasury Yields Surge to 19-Year Peak as Middle East Tensions Spike Stock Selloff appeared first on Blockonomi.