[HSBC and Citigroup have successively set their sights on the S&P 500's end-of-year 8,100 points, with different emphasis on profit and valuation assumptions] On September 9, HSBC raised the S&P 500's year-end target for 2026 from 7,650 points to 8,100 points on September 8, consistent with the target announced by Citigroup in June. Both investment banks see artificial intelligence capital expenditures and corporate earnings growth as key supports, but their assumptions about earnings and valuations are different. Citigroup in June raised its 2026 earnings per share forecast for the S&P 500 to $350 from $320 and raised its year-end target to 8,100 from 7,700. Calculated based on 8100 points and US$350 EPS, the corresponding implied price-to-earnings ratio is approximately 23.1 times. Citi also gave a preliminary forecast of earnings per share of $400 in 2027. This time, HSBC predicts that the earnings per share of the S&P 500 Index in 2026 will increase by 33% year-on-year to US$360, with a price-to-earnings ratio of 22.5 times corresponding to the 8,100-point target. The bank predicts that earnings per share growth will still exceed 25% in the second half of the year, and will use second-quarter financial performance, continued upward revisions of profit expectations, and AI capital expenditures as the main basis for raising the target. This means that although both investment banks ultimately gave a target of 8,100 points, the paths to achieve it are different: HSBC adopted a higher profit forecast and a lower valuation multiple, while Citigroup's June profit assumption was lower and its tolerance for valuation was relatively higher.