Just been looking back at what happened in the stock market back in early March, and it's a pretty solid reminder of why you can't let short-term noise mess with your head.

So that day, the major indices all took a hit. S&P 500 dropped nearly 1%, Nasdaq fell just over 1%, Dow shed about 0.8%. Doesn't sound catastrophic, but the market was clearly spooked by something bigger brewing. The culprit? Geopolitical tensions ramping up in the Middle East, oil prices spiking, and suddenly everyone's worried about shipping disruptions through the Strait of Hormuz.

What's interesting is how the stock market reacted across different sectors. Airlines and travel stocks got absolutely hammered because jet fuel costs were going through the roof. Meanwhile, defense contractors and companies like Berkshire Hathaway held up better than the broader market, which makes sense when war-related spending expectations are rising. It's the classic risk-on, risk-off rotation.

But here's the thing that actually matters if you're a long-term investor: I looked into some historical analysis on how the stock market has handled geopolitical shocks over the decades. Someone did a study of 43 major geopolitical events and crises the U.S. faced from 1940 onward. The median return six months after these events? About 5.3%. And here's the kicker—the market was actually higher roughly two-thirds of the time within a year of these events.

Two out of three years the market goes up. That's not some new discovery—it's basically what we see when you actually zoom out and look at the data. Yes, there are periods where things get messy. Inflation can spike, interest rates can rise, shipping gets disrupted. But that's noise against the long-term trend.

The stock market has shown over and over that it can absorb these shocks. The key is not panicking during the dip. Don't let the volatility derail your long-term plan. That's when most people make their worst decisions—selling at the bottom because they can't stomach the short-term pain.

If you're thinking about what to do with your portfolio when the stock market gets shaky like this, the answer's usually pretty simple: don't do anything rash. History suggests the market will take care of itself eventually.