平均而言，从1926年标准普尔综合股票指数开始以来，共和党当政时期的股市回报率要比民主党低大约十六个百分点。
On average, since the inception of the Standard and Poor’s composite stock index in 1926, the reward for putting your money in the market has been about 16 percentage points lower per presidential term under Republicans than under Democrats.