Flash Trade liquidity activity is not currently supported on Solana. When you withdraw liquidity from a Flash Trade pool, the LP token is current showing no cost basis, so the full value of the withdrawal is reported as a gain.

Users who have provided liquidity through Flash Trade on Solana

You can upvote this forum post to indicate you are experiencing this behavior. The post status will be changed to Complete once a fix is rolled out to all users. Up-voters will be notified of the status change.

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