Decentralized exchange (DEX) trading volume decreased by 11.61% to $56.75 billion over the past week, according to Phoenix Group. This decline is part of a broader reduction in DEX activity, with November's total volume reaching $397.78 billion, the lowest since June, as per DeFiLlama data. Uniswap led the weekly trading with $13.92 billion, followed by PancakeSwap at $11.61 billion and Raydium at $3.60 billion. Additionally, the DEX-to-centralized exchange (CEX) volume ratio fell to 11.46% in December, down from 15.73% in November, indicating a shift in trading preferences.