Key Takeaways CrowdStrike Holdings shares hit a record intraday high Tuesday after a cyberattack hit Chinese AI startup DeepSeek.The attack comes after tech stocks sank Monday on news that DeepSeek's AI assistant runs on less-advanced chips and at a lower cost than U.

CrowdStrike Holdings (NASDAQ: CRWD) stock is seeing strong bullish momentum in Tuesday's trading. Meanwhile, the S&P 500 index was up 0.9%, and the Nasdaq Composite index was up 2%. CrowdStrike's valuation is bouncing back after concerns about DeepSeek's new AI model spurred dramatic sell-offs for the tech sector yesterday.

Chinese startup DeepSeek said on Monday it will temporarily limit registrations due to a cyberattack after the company's AI assistant amassed sudden popularity. The startup earlier in the day was also hit by outages on its website after its AI assistant became the top-rated free application available on Apple's App Store in the United States.