On the US stock market's quadruple witching day, a beginner's analysis and reflection on yesterday's option positions. On quadruple witching days, it's wise to observe more and act less! I'm a complete newbie, so please correct me if I'm wrong or made any mistakes. I've only had my account for a month, and this is my first real encounter with quadruple witching day. Just like with zero-day options, theories learned from books are shallow; true understanding comes from practice. The story goes that after learning some theories and discussing with others a few days ago, I tried buying 1 option contract (equivalent to 100 shares). However, due to unfamiliarity with the trading interface and operational mistakes...