Key TakeawaysStarbucks shares plunged more than 12% in premarket trading Wednesday after the coffee chain reported quarterly results that fell short of expectations and trimmed its outlook for fiscal 2024 amid declining same-store sales.CEO Laxman Narasimhan said customers in the quarter had been more cautious about where and how they spend their money.Monitor if the Starbucks share price can close above the lower trendline of a descending channel around $81. Starbucks (SBUX) posted quarterly earnings and r ...