This pool facilitates trades between WETH. Your yield is generated from swap fees paid by traders when an exchange happens. GMX V2 features isolated pools consisting of a long (ETH) and short token (ETH), which serves as the counterparty for traders on GMX V2. The pool earns platform fees from leverage trading and swaps related to ETH. The price of the pool depends on the price of ETH and the net pending PnL of traders' open positions.