Portfolio Management Land Mine  ( 地雷 ) As the name feared, the misfortune of stepping on one is terrible. Will likely to have a limp blown off. A dent that is not easy to recover from. In stock context probably -50% to complete loss in a counter and depending on it's size in the portfolio it can be quite damaging to my overall returns. The fewer stocks I have in my portfolio, the higher my concentration. Too many stocks and i will exceed my bandwidth to monitor them. Growth Stocks  ( 成长股 ) High PE typically. To maintain this story the growth needs to be there to sustain. Below expectation news or even loss may have double blows to the stock price. When I foresee possible slower growth in the future is it time to take something off the table. This can also be terminated early due to pump and ...  ...