17K views · 1.4K reactions | A rare look inside high-frequency trading — computers executing thousands of trades in milliseconds. This aired in 2010, but HFT is still alive and massive, now driving more than half of U.S. market volume and profiting no matter which way stocks move, at speeds regulators can barely track. | Stock Sharks | Facebook

This test checks how well you can hear high-frequency sounds, the first ones to go as you age 👂👂👂. The lower your score, the better. I got 34 at age 46. But if you’re over 40 and struggling to hear it, then it’s probably not just your ears 👂👂👣. It could be your brain ageing faster than your body. Hearing loss is tied to faster brain shrinkage, loneliness, and even early death. When your ears start fading, your world starts shrinking 🧠👂👣. Why? → Inner ear cells die off. → Blood flow slow