Futures

Futures are similar to options, however, here the concerned parties are obligated to see-through the contract as described. Suppose party A agrees to buy Bitcoin at $7000 in two months, whereas, the current price is at $6900, from party B. After two months if the price of bitcoin goes up to $8000, party A would be able to profit from the agreement by being able to buy it for cheaper than the market rate, whereas, if the price falls to $6000, party B would profit for being able to sell it for higher than market rate.
Glossary

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