
Liqian Ren - In Search of Modern Alpha (S2E8)
Flirting with Models
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
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