The Persian Gulf conflict intensified Tuesday as U.S. forces struck targets in southern and western Iran, while Tehran attacked U.S. sites in Bahrain, Kuwait and Jordan. At least one tanker was hit in the Strait of Hormuz. The conflict also widened toward the Red Sea after the Iran-aligned Houthis threatened a naval blockade of Saudi Arabia, prompting several Saudi crude tankers to reverse course.
Oil markets responded by adding a larger supply-risk premium. Brent crude settled Tuesday at $91.01 a barrel, up 2%, while West Texas Intermediate closed at $84.91, also up 2%. The rally accelerated Wednesday morning: Brent climbed above $94 and briefly touched $95.24, while WTI approached $88 as investors confronted threats to both the Strait of Hormuz and the Bab el-Mandeb Strait.
The second chokepoint matters because Saudi Arabia has increasingly relied on Red Sea export routes as traffic through Hormuz has declined. Threats to both corridors increase the risk of longer voyages, higher insurance and freight expenses, and physical delays in crude deliveries.
Treasuries Trade the Inflation Shock, Not the Safe-Haven Story
Ordinarily, an escalation of this magnitude might produce a strong flight into government bonds. Instead, Treasuries weakened as markets focused on the inflation and monetary-policy consequences of higher energy costs.
The Treasury’s daily yield curves show that Tuesday’s two-year yield rose five basis points to 4.26%, the 10-year increased three basis points to 4.63%, and the 30-year rose two basis points to 5.13%. The move suggests investors are assigning greater probability to restrictive Federal Reserve policy and demanding more compensation to own longer-duration bonds.
That reaction is consistent with a negative supply shock: higher energy prices can raise inflation while simultaneously weakening household spending and economic growth. Reuters noted that the 10-year Treasury term premium has risen from roughly 0.46% at the end of June toward 0.70%, reflecting greater uncertainty around inflation, policy and longer-term bond ownership.
TIPS Outperform Nominals—but They Are Not Rallying
The TIPS market delivered the most useful signal. Inflation-protected securities performed somewhat better than nominal Treasuries, but their prices still came under pressure because real yields also rose.
| Treasury measure | July 20 | July 21 | Change |
| 5-year nominal yield | 4.33% | 4.37% | +4 bps |
| 5-year real yield | 2.05% | 2.09% | +4 bps |
| 5-year breakeven inflation | 2.28% | 2.28% | Unchanged |
| 10-year nominal yield | 4.60% | 4.63% | +3 bps |
| 10-year real yield | 2.35% | 2.37% | +2 bps |
| 10-year breakeven inflation | 2.25% | 2.26% | +1 bp |
| 30-year breakeven inflation | 2.20% | 2.22% | +2 bps |
Breakevens are calculated as nominal Treasury yields minus comparable real TIPS yields using official Treasury curves.
The modest widening in 10- and 30-year breakevens shows that investors are adding inflation compensation. But the increase is limited relative to the oil-price surge, suggesting the market still views much of the shock as temporary—or believes tighter Fed policy will prevent it from becoming embedded in long-term inflation.
TIPS prices have therefore not surged. Wednesday morning, the iShares TIPS Bond ETF (TIP) and Schwab U.S. TIPS ETF (SCHP) were each down about 0.14%, while the shorter-duration Vanguard Short-Term Inflation-Protected Securities ETF (VTIP) was off approximately 0.07%. Those losses were smaller than declines of roughly 0.24% in IEF and 0.26% in TLT, indicating relative TIPS outperformance even as the inflation-linked sector remained negative in absolute terms.
The distinction is important: TIPS protect against realized inflation, but they remain bonds. Their principal adjusts with CPI, yet their market prices can fall when real yields rise. Short-maturity TIPS are generally less exposed to that duration risk and may provide the cleaner defense if the immediate concern is an energy-driven increase in near-term inflation.
What Comes Next
A sustained move above $95 in Brent would probably keep breakeven inflation supported and make it harder for the Fed to respond to weakening growth with rate cuts. That environment favors shorter-duration inflation protection over long-duration nominal bonds.
A ceasefire, reopening of shipping routes or rapid fall in oil would reverse the trade. Breakevens could narrow quickly, while nominal Treasuries might benefit from renewed disinflation expectations.
For now, the fixed-income message is not a conventional flight to safety. The market is pricing a stagflation premium: higher oil, slightly higher inflation compensation and higher real yields. That combination allows TIPS to outperform nominal Treasuries relatively—but prevents them from delivering an outright bond rally
Sources
- Associated Press: Coverage of renewed U.S.–Iran strikes, Iranian missile and drone attacks, threats to shipping through the Strait of Hormuz and Red Sea, and Brent crude moving above $94 per barrel.
- Reuters: Analysis of the returning “stagflation premium,” including the approximately 30% recent oil-price increase, reduced prospects for Fed easing and the rise in the 10-year Treasury term premium.
- Associated Press Markets: Oil-price and broader market reaction, including Brent near $94, WTI above $87 and renewed concern that energy inflation could keep central banks restrictive.
- U.S. Department of the Treasury: Daily nominal Treasury par-yield curve and real TIPS yield-curve data used to calculate changes in real yields and breakeven inflation.
- FactSet Research Systems Inc. and live market data: Intraday pricing for TIP, SCHP, VTIP, IEF and TLT
