(S)+ holding cost (CC)- holding income (CR)

Holding cost refers to the interest cost of buying the underlying assets in the spot market and holding them in the future. Holding income is the income generated by the basic assets during the holding period. Therefore,

Should be equal to

Blessing cost minus holding income. If we don't set the price in this way, trading futures will come into being.

Yes

Of a specific commodity or financial instrument

and

Restricted and influenced by the same economic factors, their changing trends are roughly the same; Moreover, the spot price and futures price have convergence in the trend, that is, when the futures contract approaches the expiration date, the spot price and futures price will gradually converge.