Summary of Key Points Core Viewpoint - The ETF market showed mixed performance on December 17, with significant gains in certain sectors while others experienced declines [1][2]. Performance of Specific ETFs - The Changjiang Protection Theme ETF (517160) increased by 9.94% [1][2]. - The Rare Metals ETF (159608) rose by 3.33% [1][2]. - The Rare Metals ETF Fund (159671) saw a gain of 3.24% [1][2]. - The Brazil ETF (159100) decreased by 3.83% [1][2]. - The Brazil ETF (520870) fell by 3.28% [1][2]. - The General Aviation ETF Fund (159230) declined by 2.28% [1][2].