Wednesday was a rough day in the markets. The S&P 500 dropped 1.74%, the Nasdaq fell 2.38%, and the "fear index" — the VIX — crossed 30. That last number matters: when VIX is below 20, investors are broadly relaxed. When it gets above 30, people are genuinely worried. We're there.

The trigger isn't some dry economic report nobody reads. It's the U.S.–Iran conflict escalating in a way that's now squeezing the Strait of Hormuz — a narrow stretch of water in the Persian Gulf through which roughly one in five barrels of globally traded oil passes every single day. When that waterway gets nervous, oil prices go up fast. Brent crude hit $110. Gold is sitting near $4,435 an ounce. And treasury bond yields are rising, with the 30-year U.S. bond now creeping toward 5%.

So here's the short version of what's happening: oil prices are spiking, stocks are falling, and borrowing is getting more expensive all at once. That combination has a name — stagflation — and it's the kind of environment that tends to leave most investors wondering if anything in their portfolio is actually safe.

Not Everything Is Falling — Here's Why That Matters

Here's what most of the coverage is missing: not all ETFs are getting hit the same way. The S&P 500 index, tracked by SPY, is down broadly. But if you look inside that number, you'll see really uneven damage. Funds heavy in technology — like QQQ, which holds a massive chunk of its weight in companies like Nvidia and Meta — are getting hammered. Nvidia fell 4.16% on Wednesday. Meta dropped nearly 8%. These aren't small positions; they're the biggest bets in the fund, and they're all losing at once.

Energy ETFs, on the other hand, are in a completely different situation right now. With oil near $97 a barrel, the companies inside funds like XLE or VDE are generating serious cash. And this is where a set of metrics we track on this platform starts telling a more interesting story.

The one I want to focus on is the ROIC–WACC spread. It sounds technical, but the idea is simple. Think of a small business that borrowed $100,000 at 8% interest to buy equipment. That equipment now earns the business $15,000 a year in net profit — a 15% return on the money invested. The "spread" is the difference: 15% earned minus 8% owed = 7 percentage points of real value being created. That's ROIC (what the business earns on invested capital) minus WACC (what it costs to raise that capital — debt interest, shareholder returns, all of it).

When that spread is positive, the business is genuinely building wealth. When it goes negative, the company is destroying value even if it looks profitable on paper. Right now, energy companies are widening that spread as oil revenues surge. Meanwhile, technology companies are seeing it shrink — because their cost of capital is rising (rates are up) while future earnings estimates are being revised down. You can explore those numbers yourself by comparing XLE against QQQ in our Compare tool and looking at the ROIC and WACC columns side by side.

Wait — Is the Fed Actually Going to Raise Rates?

This is the part that's really catching people off guard. For months, the assumption was that the Fed's next move would be a rate cut. Now, markets are pricing in a potential hike instead. Why? Because oil-driven inflation is back, and the Fed's only real tool is to make borrowing more expensive — even if the inflation isn't coming from people overspending, but from a war disrupting global supply chains.

For regular investors, a rate hike means roughly this: mortgages get pricier, business loans get pricier, and the future earnings of growth companies become worth less in today's dollars. That last part is why tech stocks tend to fall when rates rise. If the money you're supposed to make five years from now suddenly gets discounted more heavily, the stock price drops today — even if nothing changed at the actual company.

Europe is already dealing with this. UK government bonds have hit 15-year highs. The ECB is openly talking about raising rates in April. One Bloomberg strategist put it bluntly: "all bets are off." Foreign investors pulled a record $12 billion out of Indian stocks this week. The nervousness is genuinely global.

What Tends to Hold Up in This Kind of Market

There's no perfect hiding spot, but history gives us some clues. When oil spikes and rates rise together, the businesses that tend to do best are those that can pass higher costs on to their customers without losing them, generate strong cash flow today (not five years from now), and don't depend on cheap debt to survive. You can filter for exactly those characteristics using the Advanced Filter here — specifically FCF Margin, Gross Margin, and ROIC above WACC.

Gold is doing exactly what it usually does in this environment: rising. GLD was up over 1% on the day and is now near all-time highs. That's not surprising — gold doesn't pay interest, which sounds like a weakness when rates are high. But when investors start fearing that everything is risky, they tend to reach for it anyway.

One Reason Not to Panic

Here's an honest counterpoint though. Oil shocks driven by geopolitics almost always look scarier at the start than they end up being. When a conflict cools, even slightly, oil retreats fast — and rate expectations flip with it. Trump extending the Iran strike deadline this week actually signals that a negotiated pause is still possible. If that happens, the whole picture changes within weeks. Energy stocks give back gains, tech stabilizes, and the Fed is back to cutting.

The market isn't broken. It's reacting to a genuine shock in real time, and that means volatility is the price of staying invested. The VIX at 30 is fear, not collapse. The investors who tend to regret it most are the ones who make big moves based on a single bad week and get the timing wrong on both sides.

If you're wondering how your specific ETFs hold up across both scenarios — oil-shock-stays vs. oil-shock-fades — the most useful thing is to actually look at what's inside them. The Compare tool lets you put two funds side by side and see where the real metric differences are. That's a more grounded basis for a decision than watching the VIX number and getting anxious.

Sources: CNBC Markets (Mar 27, 2026) · Bloomberg Markets (Mar 27, 2026) · CNBC: Markets now see Fed's next move as a potential rate hike · CNBC: European borrowing costs hit 15-year highs · CNBC: Brent oil tops $110 as Chinese ships turned away from Strait of Hormuz. Market data as of March 27, 2026. This article is for informational purposes only and is not financial advice.