Shares of Sprouts Farmers Market Inc. plunged over 12%, on track for the biggest one-day decline since November 2016, after grocery chain specializing in fresh and organic products reported disappointing first-quarter results. The company reported earlier net income that rose to $66.6 million, or 50 cents a share, from $46.3 million, or 33 cents a share, in the same period a year ago, and beat the FactSet earnings-per-share consensus of 49 cents. Revenue rose 14% to $1.3 billion, in line with the FactSet consensus, but same-store sales growth of 2.7% was well below expectations of 3.9%. The company also cut its 2018 guidance ranges for same-store sales growth to 1.5% to 2.5% from 2.5% to 3.5% and for revenue to 10.5% to 11.5% from 11.5% to 12.5%. On the post-earnings conference call, Chief Executive Amin Maredia said as of May 1, the company discontinued its Amazon Prime Now home delivery partnership, which was started 18 months ago. Amazon.com Inc. owns Sprouts' rival Whole Foods Market. Sprouts' stock has now shed 20.4% over the past three months, while the S&P 500 has lost 5.8%.