After working on Wall Street for three years, she managed US$1.5 Billion using a 47-factor quantitative model. After returning to China to join private equity, someone questioned her model's "overfitting" at the voting meeting, so she opened the code on the spot to fight back.
The new investment director Tang Qian, an alumnus of M University, has a cold and vicious tongue, and looks at everything as if he were reading a financial report.
Lian Fanfan thought he was a superior who came to grab territory.
It was not until three days before the market crashed that her risk control model issued a signal to reduce positions. Without saying a word, Tang Qian also cut his subjective position - he didn't ask her for data basis, he just said "it's up to you".
For the first time, Lian Fanfan felt that besides data, there were things that were not completely noise.
Later she discovered that he stood next to her workstation for half an hour every day, not reading the code. The cup of American style that is always double concentrated, without sugar or milk, on her table is not something that is "taken with you". He counted how many cups of coffee she drank each day, then switched to hot milk when she reached her sixth cup.
Later, someone invaded her model system, and Tang Qian said in front of everyone: "He touched your things."
Not "corporate". It's "yours".
——The professional instinct of a quantitative trader tells her that this is not overfitting. This is the signal.
And the expected return of this signal is infinite.
Intention: In an uncertain world, there is always a person's existence itself, which is your greatest certainty.