NO.PZ2023040301000086
问题如下：
With respect to efficient market theory, when a market allows short selling, the efficiency of the market is most likely to:
选项：
A.
increase
B.
decrease
C.
remain the same
解释：
According to the theory, reducing the restrictions on trading will allow for more arbitrage trading, thereby promoting more efficient pricing. Although regulators argue that short selling exaggerates downward price movements, empirical research indicates that short selling is helpful in price discovery
为什么说允许套利的时候市场有效性会增加呢？
