Real-Time VaR Calculations for Crypto Derivatives in kdb+/q

Cryptocurrency market is known for exhibiting significantly higher volatility than traditional asset classes. Efficient and adequate risk calculation is vital for managing risk exposures in such market environments where extreme price fluctuations occur in short timeframes. The objective of this work is to build a real-time computation workflow that provides Value-at-Risk (VaR) estimates for nonlinear portfolios of cryptocurrency derivatives. Many researchers have examined the predictive capabilities of time-series models within the context of cryptocurrencies. In this work, we applied three commonly used models — EMWA, GARCH and HAR — to capture and forecast volatility dynamics, in conjunction with delta-gamma-theta approach and Cornish–Fisher expansion to crypto derivatives, examining their performance from the perspectives of calculation efficiency and accuracy. We present a calculation workflow which harnesses the information embedded in high-frequency market data and the computation simplicity inherent in analytical estimation procedures. This workflow yields reasonably robust VaR estimates with calculation latencies on the order of milliseconds.