As MarketWatch noted earlier, the S&P 500 was on track on Friday to tally what would be its fifth straight record finish. Assuming this milestone comes to pass, it would mark the longest streak of ...

"During the last 35 years, other sharp increases in speculative trading activity have signaled above-average subsequent 3-, 6-, and 12-month S&P 500 returns, but returns typically faltered on a ...