5 things to know before the stock market opens on Friday

Here are the top five things investors need to know to start day trading:

of S&P 500 it briefly crossed the 5,500 level for the first time on Thursday before retreating. The broad market index closed down 0.25% while the Nasdaq Composite fell 0.79%. of Dow Jones Industrial Average, meanwhile, rose 299.90 points, or 0.77%, good for its best day of the month. Despite Thursday’s negative return, stocks are heading for a winning week, with the S&P 500 and Nasdaq hitting new highs earlier in the week. Follow live market updates.

This spring saw a surge in new artificial intelligence technology, and the official start of summer will be no different. AI company Anthropic debuted its most powerful artificial intelligence model on Thursday. Competitor OpenAI announced the Claude 3.5 Sonnet, saying it was faster than its previous flagship model. Claude is a chatbot like OpenAI’s ChatGPT and Google‘s Gemini, and all three companies have seen the technology explode in popularity in the past year. Anthropic also announced a tool called «Artifacts» that it said will be useful for code development, drafting and analyzing legal contracts, writing business reports and more.

Biopharmaceutical company Gilead said its experimental shot to prevent HIV was 100% effective in a late-stage trial. The lenacapavir injection, if approved, would be administered twice a year and would be a longer-acting option that could affect people who can’t or don’t want to take a daily pill. Gilead must replicate the results in another Phase 3 trial before seeking FDA approval. If that test goes well, the company could bring the sale to market by the end of 2025. Shares of the company rose about 8.5% and marked their best day since 2022.

Shares of Trump Media «The company behind the conservative social media site Truth Social, which is majority-owned by former President Donald Trump — fell roughly 15% on Thursday, deepening a stock selloff. The stock saw massive trading volume during day, as more than 13.2 million shares of Trump Media changed hands — more than triple the 30-day average trading volume. roughly $3 billion after Thursday’s close.Thursday’s losses follow the company saying its registration statement was effective, allowing early investors in the company to resell certain shares and exercise stock warrants The media has been down since May 30, when a New York jury convicted the former president on 34 counts of falsifying business records.

Paper beats plastic. Amazon said Thursday that it has eliminated 95% of plastic air bags in North America, its biggest effort to reduce plastic packaging to date. The company is replacing them with paper fillers made from 100% recycled content. It began moving away from plastic fillers in October, when it announced its first automated fulfillment center in the US to eliminate plastic delivery packaging.

CNBC’s Samantha Subin, Hayden Field, Angelica Peebles, Kevin Breuninger and Katie Bartlett contributed to this report.

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