NVIDIA's upcoming AI panel is expected to impact AI stocks, with shares up 1.2% premarket. Tesla faces downgrades, with Wells Fargo cutting target to $125. Analysts express concerns over Tesla's stock performance, down 58% from high. NVIDIA shares decline after reports of competition. Market sentiment on Tesla turns bearish as price targets are slashed, making it the worst S&P 500 performer. Analysts debate Tesla's future growth prospects amidst stock selloff. NVIDIA faces stock downturn amid competition concerns, with shares slumping 3.3%. Investors await news from NVIDIA's AI conference next week.