A quantitative tool for fixincome instrument
Rails 3.2
A Python Finance Library that focuses on the pricing and risk-management of Financial Derivatives...
Python Backtesting library for trading strategies
#3 楼 @hooopo 连这种 gem 都有,我服了。
StackOverflows 上有讨论用 database 的 default value,结论是不怎么好,除了修改比较麻烦外,好像还有一个原因,我忘了。