Group 1 - The article questions the effectiveness of dollar-cost averaging (DCA) and emphasizes the importance of considering what to do in case of losses rather than just focusing on profit-taking [1][4][6] - It presents a case study showing that a 10-year investment in the SSE 50 index could result in zero returns, highlighting the potential risks of long-term DCA strategies [4][10] - The probability of a 10-year DCA resulting in zero or negative returns is noted to be as high as 17%, based on historical data from the CSI 300 index [10][12] Group 2 - The article argues that DCA does not inherently improve returns and that in a consistently rising market, lump-sum investments typically yield higher average returns than DCA [11][12] - Research indicates that DCA is more suitable for volatile markets like A-shares, while lump-sum investments are preferable in stable markets like U.S. equities [12][18] - The article suggests that many investors fail to adopt a systematic asset allocation strategy, leading to confusion and suboptimal investment decisions [20]