The inflation trade is making an unexpected comeback. Saudi Arabia's crude oil production fell to 6.2 million barrels per day in August, down 23% from July and the lowest monthly level this year, according to OPEC data the Financial Times cited. Saudi crude exports also plunged to about 3.1 million barrels per day from 5.1 million in July, as disruptions to export routes constrained shipments.

The supply shock has pushed Brent crude back above $100 a barrel. U.S. producer prices are showing signs that higher energy costs are feeding through the economy.

The Producer Price Index rose 5.4% year over year in August, up from 4.8% in July. Energy prices jumped 4.2% during the month, while diesel prices surged 24.1%.

The inflation risk is particularly significant because oil prices have historically moved closely with U.S. consumer prices. The Kobeissi Letter said its analysis showed a "near-perfect correlation" between oil prices and U.S. CPI inflation, noting that oil prices had risen another 22% since the August 12 CPI report.

The combination is particularly uncomfortable for investors because markets are now pricing a much more hawkish Federal Reserve. The odds of a 25-basis-point rate hike at the September meeting climbed to about 71% after the PPI report, according to CME FedWatch.

That backdrop could make several defensive ETFs worth watching.

XLE Offers a Direct Oil Hedge

The Energy Select Sector SPDR Fund (NYSE: XLE) is arguably the most direct equity play on the oil shock. Energy stocks can benefit when higher crude prices boost revenue and cash flows across the sector.

XLE has already gained about 46% this year, significantly outperforming the Nasdaq-100's roughly 16% advance, according to recent market data.

TIP Targets Inflation

The iShares TIPS Bond ETF (NYSE: TIP) provides exposure to Treasury Inflation-Protected Securities, whose principal adjusts with inflation. That makes it a more direct hedge against a renewed rise in consumer prices.

However, TIP is not immune to higher rates. Rising real yields can weigh on TIPS prices even as inflation expectations increase.

SGOV Limits Rate Risk

The iShares 0-3 Month Treasury Bond ETF (NYSE: SGOV) offers exposure to very short-term U.S. Treasury securities. Its low duration makes it less vulnerable to rising yields than longer-term bond funds.

If the Fed remains hawkish, short-term Treasury yields could remain attractive while investors avoid taking substantial duration risk.

XLP Adds Defensive Stocks

The Consumer Staples Select Sector SPDR Fund (NYSE: XLP) provides exposure to companies selling essential goods and services. Staples demand tends to be more resilient when economic conditions deteriorate, although higher input and transportation costs can pressure margins.

GLD Adds a Geopolitical Hedge

The SPDR Gold Shares ETF (NYSE: GLD) offers another layer of protection. Unlike TIP or SGOV, gold is not directly tied to U.S. interest rates and can benefit from geopolitical uncertainty and demand for traditional defensive assets.

For investors facing a possible combination of higher oil, stickier inflation and renewed Fed tightening, the defensive playbook may therefore extend beyond bonds. Energy, inflation-linked securities, short-duration Treasuries, staples and gold each offer a different way to navigate the shock.