Ever noticed how Bitcoin tends to swing hard around certain dates? Here's something traders track closely: March saw a 16.6% drop, June fell 8.5%, and September dipped 7.9%. Coincidence? Not really. Each of these months lined up with quad witching day expirations—when massive derivatives contracts on futures markets expire simultaneously.

When you've got billions in open interest expiring at once, the market moves fast. Institutions need to unwind positions, volatility spikes, and retail traders get caught off guard. It's not manipulation, it's just how order flow works at scale.

Most retail participants don't track this pattern, which is exactly why it repeats. The smart money positions ahead of these dates knowing the mechanics are predictable. If you're trading or holding Bitcoin, understanding quad witching cycles could save you from panic selling at the worst time—or help you capitalize on the volatility.

Worth paying attention to the calendar if you're serious about crypto markets.