Evaluate whether the following actions are likely to increase stock market efficiency, decrease it or leave it unchanged, and explain why.
a. The government imposes a transaction tax of 1% on all stock transactions.
Increase Efficiency___ Decrease Efficiency___ Leave unchanged___
b. The securities exchange regulators impose a restriction on all short sales to prevent rampant speculation.
Increase Efficiency___ Decrease Efficiency___ Leave unchanged___
c. An options market, trading call and put options, is opened up, with options traded on many of the stocks listed on the exchange.
Increase Efficiency___ Decrease Efficiency___ Leave unchanged___
d. The stock market removes all restrictions on foreign investors acquiring and holding stock in companies.
Increase Efficiency___ Decrease Efficiency___ Leave unchanged___