NO.PZ201809170400000208
问题如下：
The risk that Tong discloses regarding the equity futures strategy is most likely:
选项：
A. basis risk.
B. currency risk.
C. counterparty risk.
解释：
A is correct. Basis risk results from using a hedging instrument that is imperfectly matched to the investment being hedged. Basis risk can arise when the underlying securities pay dividends, because the futures contract tracks only the price of the underlying index. Stock splits do not affect investment performance comparisons.
请问什么是basis risk
