Beyond Meat shares drop amid confusion about McPlant offering from McDonald's

Shares of Beyond Meat fell Tuesday after the company issued disappointing third-quarter results that capped a volatile day for the stock on Wall Street. It all started Monday when McDonald’s announced new plant-based offerings. Confusion ensued about whether Beyond Meat, which made a meatless patty for a McDonald’s test in Ontario, would be a supplier for the McPlant. CNBC's "Squawk on the Street" crew discusses.