Quest Diagnostics (DGX) had a large straddle sell at 3:15pm Tuesday, as 2,000 March 55 straddles were sold for $3.25, believing shares are trapped between $51.75 and $58.25 through March. That puts shares between a gap as resistance and a double bottom support level, so a fairly high probability trade, although the value is not all that great as IV is already depressed at 22%, near 52 week lows. At a fair valuation of 12X earnings and 13.5X cash flow, and no near term catalysts, the trade might make some sense.