TO DO
- 融资融券：
知乎 https://www.zhihu.com/search?type=content&q=%E8%9E%8D%E8%B5%84%E8%9E%8D%E5%88%B8
360图书馆-http://www.360doc.com/content/14/1204/21/435645_430448425.shtml
- ETF
[知乎] ETF到底是什么
[知乎] ETF终极攻略，多读几遍 | 干货
知乎 https://www.zhihu.com/search?type=content&q=%E8%9E%8D%E8%B5%84%E8%9E%8D%E5%88%B8
360图书馆-http://www.360doc.com/content/14/1204/21/435645_430448425.shtml
[知乎] ETF到底是什么
[知乎] ETF终极攻略，多读几遍 | 干货
