To many, the markets can be pictured as a contest of ideas. Bulls versus bears, buyers versus sellers, strategy versus strategy. But underneath that, another competition is happening. One that has nothing to do with who’s right about a stock. It’s about speed.
High-frequency trading, or HFT, is exactly what it sounds like. Firms run algorithms that send and cancel thousands of orders in microseconds. Not seconds. Not milliseconds. Microseconds. Faster than a human can blink. Faster than your internet connection can register. This is the real battleground of modern markets.
Why does that matter to retail? Because every order you place has to compete against this system. HFT firms live in data centers right next to the exchanges. They pay millions for the fastest cables and shortest routes so their orders hit the book first. When they see your trade coming, they can react before it’s even confirmed. To call it an uneven race is generous.
Now here’s the uncomfortable truth: HFT is not about predicting stock direction. It’s about skimming fractions of a cent, over and over, at a scale so large it adds up to billions. They don’t need to guess earnings. They don’t need to pick the next big winner. They just need to be first in line, always. And they are.
Take this in: a 2019 study found that HFT activity made up more than half of all U.S. equity trading volume. Half. That means when you think you’re trading against other investors, you’re actually trading against machines designed to capture pennies before you even know they’re there.
What does this mean for retail? It means the playing field isn’t just tilted. It’s wired against you. But it also means you stop looking at markets as if they’re all the same. Day trading against HFT is suicide. Long-term investing, identifying anomalies, or focusing on flows that machines can’t fully digest—that’s where real opportunity lies.
Final Thought
The race you can’t see will never stop. It isn’t going away. But understanding that it exists is the first step to competing differently. Retail loses when it pretends the market is fair. It wins when it learns where the machines don’t have the edge and focuses its energy there.