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The Importance of Portfolio Management
When we do act as momentum of value signal, we usually take end of day, previous day value and give each stock a score. And then the portfolio manager is supposed to buy the stocks with a high score. But when I start managing the portfolio, I found that almost day to day, if you have cash flow every day, it's up 10%, or it's down 10%. Now your signal is calculated by based on yesterday's. What do you do? The trader will always say, like, what should I do? And I was like, I don't know what to do because in my model, I never thought about this. So we actually did a research project just to