BoBo's Blog

The Most Valuable Skill in Investing: Self-Control

This post is an English adaptation of a Chinese WeChat article. Original source: https://mp.weixin.qq.com/s/eA0I3fi8VGpC6lg-me-66w ...

Why Do Prices Drop After You Buy and Rise After You Sell?

This post is an English adaptation of a Chinese WeChat article. Original source: https://mp.weixin.qq.com/s/7sRF5tNqPLgabkAp5KGfwQ ...

Don’t Wait to Get Rich: The Real Starting Point of Compounding

Many people delay investing because they feel their principal is small and returns are low. But the true starting point of compounding is not how much you have—it’s when you start and whether you keep contributing. ...

Cost Basis Pitfall: Sold Above Cost, Still Lost Money

A real trade, an unexpected loss, and a hard lesson on cost basis. On Feb 3, 2026, I sold part of a position I had held for months in an “xxx Gas ETF”. The cost shown on my holdings page was about RMB 0.84, while the market price was around RMB 0.933. It looked like the price was clearly above cost, so I assumed any sale would be a profit. But after selling 1,800 shares at RMB 0.932, the trade record showed a loss. This post records the full path from “that makes no sense” to “I understand the cost basis” so you do not repeat the same mistake. ...

Why AI Makes Us Busier: Three Questions About Tech and Human Nature

My wife has asked me many times lately: “AI has taken 90% of your coding work, so why are you even busier now?” My laptop has practically taken over the dining table. When I’m awake, I’m either typing prompts or combing through my task list to polish details. The corner of the house meant for rest has basically become a temporary workspace. I asked myself the same thing for a long time. It wasn’t until several side projects started moving forward, and I recalled the technological metaphors in The Three-Body Problem, that the answer became clearer. ...

Why a 96 bp Error Can Move a 1,000 RMB Bond by 120 RMB

A recent question in the inbox: “A bond’s yield forecast was 96 basis points below the actual level. Why would that create a 120 RMB price gap per 1,000 RMB face value?” Behind that question are the three core ideas of bond investing: rates, price, and duration. If you understand those three, you can explain most bond price moves. ...

Stop Predicting, Focus on What You Control: A Value Investing Checklist

Many people treat investing as a prediction contest: guess policy, guess sentiment, guess tomorrow. But Duan Yongping and Buffett repeat a simpler path: do the right things as well as you can, and keep losses manageable when you are wrong. This checklist turns “stop predicting” into actions you can actually do, and keeps your energy focused on what you control. ...

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