Earnings rise for Natural Grocers by Vitamin Cottage By: MarketMinute.com Stock News May 04, 2018 at 19:26 PM EDT Natural Grocers by Vitamin Cottage Inc. (NYSE: NGVC) reported higher second quarter earnings and revenue and lifted its 2018 guidance for daily average comparable stores sales growth. The stock price soared $1.60 to close at $8.50. Related Stocks: Natural Grocers By Vitamin Cottage Inc