Best Buy -2% after JPMorgan turns cautious

• JPMorgan downgrades Best Buy (NYSE:BBY) to a Neutral rating after having the retailer previously slotted at Overweight.
• Sales at Best Buy are running below the expectations built into share price, reasons JP.
• The investment firm cut its price target on the stock to $40 from $45.
• BBY -1.88% premarket to $35.45.