Here are the most important news, trends and analysis that investors need to start their trading day:

• Dow set to drop after hitting an intraday record
• Southwest, American report adjusted losses but better revenues
• Tesla beat on earnings, revenue; delivered lots more cars
• WeWork to go public in a SPAC deal at much lower valuation
• Trump announces social media platform plan, SPAC deal

1. Dow set to drop after hitting an intraday record

Dow futures dropped about 100 points Thursday as Dow stock IBM sank nearly 5% in the premarket, the morning after delivering lower-than-expected quarterly revenue. The Dow Jones Industrial Average on Wednesday set a new intraday all-time high but finished just under its Aug. 16 record close.

The S&P 500's rose for the sixth straight session, ending fractionally shy of its Sept. 2 record close. The Nasdaq fell modestly Wednesday. The tech-heavy index was more than 1.6% away from its Sept. 7 record close. Bitcoin took a breather Wednesday, one day after hitting an all-time high near $67,000. The 10-year Treasury yield rose above 1.66% after Thursday's look at weekly initial jobless claims showed a drop to 290,000. That's fewer than expected and another Covid-era low.

2. Southwest, American report adjusted losses but better revenues

Southwest Airlines on Thursday reported a third-quarter profit thanks to a boost from federal payroll aid. However, excluding one-time items, the carrier posted a per-share loss of 23 cents. Revenue was also better than analysts had expected. Southwest earlier this month canceled more than 2,000 flights, blaming the issues on bad weather in Florida and air traffic control issues compounded by staffing shortages. The airline said the cancellations and customer refunds cost $75 million. Shares of Southwest — up just 6% this year — rose slightly in the premarket.

American Airlines on Thursday reported a profit for the third quarter thanks to federal payroll support. Excluding one-time items, American posted a loss of 99 cents per share. Revenue for the quarter was also better than expectations. Shares of American — up nearly 24% in 2021 — gained 1% in the premarket.

3. Tesla beat on earnings, revenue; delivered lots more cars

Shares of Tesla — up more than 20% in 2021 and up 100% over the past 12 months — slipped 1% in Thursday's premarket, the morning after the electric automaker reported third-quarter earnings and revenue that best estimates. Tesla delivered about 73% more vehicles than it had in the same quarter a year ago. Despite citing a variety of challenges, including semiconductor shortages and rolling blackouts, Tesla reiterated prior guidance that it expects to "achieve 50% average annual growth in vehicle deliveries" over a multiyear horizon.

4. WeWork to go public in a SPAC deal at much lower valuation

WeWork is set to start trading as a public company Thursday, two years after its much-anticipated planned IPO imploded due to investor concerns over its business model and founder Adam Neumann's management style. After Neumann was ousted, Japan's SoftBank, already a major investor, bailed out the teetering WeWork. In March, the office-sharing company agreed to merge and go public in a deal with special purpose acquisition company BowX Acquisition. It values WeWork at $9 billion, a far cry from its steep valuation in 2019 of $47 billion.

5. Trump announces social media platform launch plan, SPAC deal

Former President Donald Trump announced Wednesday he will be launching his own media network, including a social media platform. The app appears to be the first project of the Trump Media and Technology Group, which will go public through a SPAC merger with Digital World Acquisition. That's according to an announcement tweeted out by spokeswoman Liz Harrington. Trump, while president, was notoriously banned by major social media giants earlier this year, following his posts related to the Jan. 6 riot at the U.S. Capitol.

— Reuters contributed to this report. Follow all the market action like a pro on CNBC Pro. Get the latest on the pandemic with CNBC's coronavirus coverage.