Starbucks' labor battle threatens to undermine its comeback plan as strike launches on Red Cup Day
1. Starbucks baristas initiated another strike on Red Cup Day, impacting sales. 2. Over a thousand baristas walked off the job across 40 US cities. 3. The labor action is part of ongoing negotiations for fair labor contracts. 4. Shareholders express concerns over the impact of labor tensions on profits. 5. Starbucks stock has declined over 5% this year amid labor disputes.