Tesla (TSLA) continues its race to break a new all-time high with the stock now 15% higher so far in December. Alex Coffey looks into the stock's tradability amid recent volatility. Meanwhile, Reddit (RDDT) rallies after getting an upgrade and big price target hike from Morgan Stanley. Paypal (PYPL) also got a bump from a Bank of America upgrade. AMD inc. (AMD) traded lower due to a downgrade over changes in the A.I. landscape.