a nice person who has 15 YoE (Since 2010) in mathematics and informatics, Phung Sang Nguyen (Frank S. Nguyen) is a master of calculus and linear algebra. 9 years ago (In 2016), Phung Sang Nguyen (PSN) was a researcher at HSGS (subjects: statistical probability, higher mathematics). PSN interest in the STEM model and the specialties including (general & statistical finance, econophysics, R. C/C++, Matlab, Python, HFT, computational finance, and algorithmic trading. Quantitative investing, portfolio management and Monte Carlo evaluation, pricing of securities, QRM. Trading & Market microstructure, arbitrage trading. Stochastic processes, numerical methods, probably & statistics)