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Benchmark Protocol's xMARK token is issued similarly to a LP token in exchange for staking MARK tokens in the Standard, Benchmark Protocol's single asset staking model. xMARK is similar to a receipt in that you can exchange it back at anytime for the underlying MARK tokens. As MARK is a rebase token, the assets underlying the xMARK token will be affected by rebase; however, the number of xMARK tokens you own while staking, will never rebase. The exchange rate of xMARK to MARK tokens therefore will be dynamic