Looking for a stock that has been consistently beating earnings estimates and might be well positioned to keep the streak alive in its next quarterly report? Quest Diagnostics (DGX) , which belongs to the Zacks Medical - Outpatient and Home Healthcare industry, could be a great candidate to consider.When looking at the last two reports, this medical laboratory operator has recorded a strong streak of surpassing earnings estimates. The company has topped estimates by 2.31%, on average, in the last two quarte ...