By that measure, the climb by the S&P 500 SPX, -0.51% to territory above 3,250 — it stood at 3,240 after midday Friday — would mean that the average employee, with an hourly wage of $28.29, would need to work 114.88 hours to buy a single unit of the index ($28.29 x 114.88 = 3,249.96)...