Quest Diagnostics traded at $183.49 this Friday September 5th, increasing $3.38 or 1.88 percent since the previous trading session. Looking back, over the last four weeks, Quest Diagnostics gained 6.06 percent. Over the last 12 months, its price rose by 20.12 percent. Looking ahead, we forecast Quest Diagnostics to be priced at 181.97 by the end of this quarter and at 177.47 in one year, according to Trading Economics global macro models projections and analysts expectations.