The transactions that margin is performed by buyers and sellers include: futures trading, options trading, and margin trading.

1. Futures trading: In futures trading, both buyers and sellers need to pay a certain proportion of margin to the futures exchange to ensure transaction performance and risk control. Generally speaking, the margin ratio is determined according to the regulations of the exchange and the specific conditions of the contract.

2. Options trading: In options trading, both the buyer and the seller need to pay a certain proportion of margin to the options exchange to ensure transaction performance and risk control. Similar to futures trading, the margin ratio is also determined based on the regulations of the exchange and the specific conditions of the contract.

3. Margin and securities lending transactions: In margin trading and securities lending transactions, the buyer needs to pay a certain percentage of margin to the securities firm for the transaction of borrowing stocks. The seller needs to pay a certain percentage of margin to the brokerage to sell the stocks that it does not hold. In this case, the deposit is mutually paid by the buyer and seller.