B为啥不对吗，因为套利者存在史价格均衡啊

问题如下：

A junior trader at an investmentcompany is studying the structure of futures markets and the related spotmarkets for their underlying assets. The trader wants to identify anyrelationships that exist between the price movements in each market and any specifictrades that can be recommended based on these relationships. Which of thefollowing is correct regarding futures prices and spot prices?

选项：

A.

Futures prices may vary widely from the spot price of the underlying asset, but the two prices will typically converge as a futures contract approaches maturity.

B.

Arbitrageurs keep the futures price and the underlying spot price close to each other throughout the life of the contract.

C.

If the futures price is above the underlying spot price during the delivery period, a trader can profit by buying futures contracts and selling the underlying asset in the spot market.

D.

The S&P 500 futures contract has the most trading activity of any futures contract due to its requirement to take physical delivery on the delivery date.

解释：

A is correct. Futures prices typically converge toward the spotprice of the underlying asset as a futures contract approaches maturity.

B is incorrect. Arbitrageurs will play a vital role in theconvergence of futures prices and underlying spot prices during the deliveryperiod.

C is incorrect. If the futures price is above the underlying spotprice during the delivery period, an opportunistic trader should sell thefutures contract and buy the asset in the spot market.

D is incorrect. The S&P 500 futures contract is cash settled sothere is no trading activity related to taking physical delivery.