问题如下：
Equity futures are used by index fund managers to take advantage of a good future market outlook. But he concerns about underlying securities pay dividends, while the futures contract tracks only the price of the underlying index. The risk that fund managers concern regarding the equity futures strategy is most likely:
选项：
A. basis risk.
B. currency risk.
C. counterparty risk.
解释：
A is correct.
考点：Derivatives-Based Approaches
解析: 基差风险源于使用与基础资产不完全匹配的对冲工具。当标的证券支付股息时，会产生基差风险，因为期货合约只跟踪标的指数的价格。
请问这是哪一个reading里的知识点？
