Know these 5 things before the stock market opens on June 18

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

This is another record for the S&P 500. Gains from megacap tech stocks lifted the broader index during Monday's trading session, with the index closing at a new high of 5,473.23 after rising 0.77%. Megacap gains also boosted the information technology sector by 1.2%, with Apple, Microsoft, Alphabet, Amazon and Meta Platforms all ending the session higher. The Nasdaq Composite also closed 0.95% higher at 17,857.02. This performance comes after both indexes recorded their seventh weekly gain in eight weeks. The Dow Jones Industrial Average closed just behind both indexes, snapping a four-day losing streak by gaining 0.49% for the session. Follow live market updates.

Nvidia is on the move. The index that the Technology Select Sector SPDR Fund (XLK) follows is to be rebalanced, with new calculations showing Nvidia's weighting rise to 21%. The stock's weighting was just 6% as of June 14. Overall, the new calculations will show Microsoft being the top stock in the index with about 21%, followed by Nvidia, according to Matthew Bartolini, head of SPDR Americas Research. Apple's weighting, on the other hand, is projected to be 4.5% after the rebalancing, much lower than its 22% weighting as of June 14.

Apple Pay Later is being shut down. Apple, which launched its buy-now-pay-later program last year, said Monday that it has stopped issuing loans through the program in the U.S. The loans allowed customers to pay up to $1,000 for online purchases in four interest-free installments. This comes after the company announced last week that it was going to allow installment loans later this year in its Apple Pay checkout process through third-party companies like Affirm, as well as credit and debit cards from issuers including Citigroup. Rest assured, users with open loans will still be able to access Apple Pay Later features to pay down their loans, the company said.

GameStop's future appears unclear at the moment. The stock hit a session low during Monday's session after the video game retailer's annual meeting provided no updates on its strategies or future plans. The meeting lasted about 30 minutes, and no shareholders were able to ask questions. Although the retailer's CEO, Ryan Cohen, reiterated the company's plans to focus on cutting costs and increasing profits in his introductory speech, he did not provide any specifics about future growth strategies. The company's shares were trading 17% lower at $23.79 in the session.

The menu will no longer have artificial intelligence. McDonald's is officially ending its AI drive-thru technology experiment with IBM — a partnership that began in 2021 — at more than 100 restaurants. The automated order taker technology will shut down no earlier than July 26, according to a memo sent to franchisees late last week and obtained by CNBC. Two sources familiar with the AI ​​technology told CNBC that it faced challenges interpreting different accents and dialects. They said this affected order accuracy. The move comes at a time when restaurants such as Del Taco and Panera have already begun testing ways to use AI to streamline business operations.

, CNBC's Samantha Subin, Tanya Machel, Jesse Pound, Kiff Leswing, Yun Lee, Gabrielle Fonrouge and Kate Rogers contributed to this report.

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