Stocks haven't done much in a while. Wednesday marked the eight-straight day that the S&P 500 had closed less than 1 percent above or below its prior closing price. Ominously, the last time the market staged this long a period of quiescence was in early August — shortly before stocks took a gut-wrenching tumble. Now, as then, "we are at a precarious position," Erin Gibbs of S&P Investment Advisory said Wednesday on CNBC's "Trading Nation." "We're trading at fairly high valuation and earnings growth doesn't look that good, so any big shocks — disappointment from China, any movement from the...