MIT published a full lecture on risk-neutral pricing and Black-Scholes equation.
It covers forward contracts, options valuation, stochastic calculus, and why derivative prices depend on volatility.
To all quants out there turn on Notifications, new article will be out tomorrow!
This 17 page pdf reveals the same technique Hedge Funds like Jim Simons' Renaissance Technologies use to find signal through noise.
Stanford released the complete Hidden Markov Model framework for everyone to use it.
Bookmark it before someone takes it down:
"Crowding doesn’t tell you where the market is going. It tells you how hard you’ll hit the ground if it falls." (拥挤度并不能告诉你市场会往哪里走。它只是告诉你,如果市场跌倒,你会摔得有多惨。)