My portfolio value had reached its peak at about $530k mid of April and fell all the way down to about $380k mid of June. It was just 2 months away, my portfolio value had been up and down for 30% in variation. This tells that investing in stock market will never be easy. It involves human emotion: greed, fearful, daring, worry, eagerness, willing and unwilling, and all macro issues around us. As for me, i am doing my best to create a System for my Investment - will call it BSPA. A system that is able to work well and make me sleep well at anytime in the market: bull or bear. How does BSPA work? BSPA stands for Buying Selling Portfolio Allocation. These 3 things are very important in order to create and maintain a Sustainable Portfolio. I just want to focus on BSPA - the things i can control. (1) Buying Strategy: ......