Updated from 7:39 a.m. EDT to include U.S. economic data.

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Here are five things you must know for Thursday, July 21:

1. -- Elon Musk has a master plan and his vision for the future of Tesla Motors (TSLA - Get Report)  includes spreading the company's wings beyond just electric cars.

In an update to his 2006 manifesto, Musk late Wednesday said he hopes to broaden the company's focus toward other transport segments, including heavy-duty trucks and buses. Musk also included solar-charging battery packs, self-driving taxis and advanced autonomous driving in his long-term vision for the company.

Musk said both a bus and a commercial truck should be ready for unveiling next year.

The timing of Musk's update could be seen as an effort to win over skeptics to Tesla's plan to acquire SolarCity (SCTY) , of which Musk serves as chairman. Musk said Tesla needs to "create a smoothly integrated and beautiful solar-roof-with-battery product that just works," but adds, "we can't do this well if Tesla and SolarCity are different companies."

What do investors think of Musk's "master plan?" The stock was falling 1% in premarket trading on Thursday after rising earlier.

2. -- Joy Global (JOY) shares jumped 17.4% in premarket trading after Japanese construction-gear maker Komatsu (KMTUY)  agreed to buy the Milwaukee-based mining-equipment company.

Komatsu said it's paying $28.30 a share ($2.89 billion) for Joy Global, an 18% premium to Joy Global's closing price on Wednesday. With debt, the deal is valued at $3.7 billion.

The Japanese company said the purchase reflects a recently launched three-year plan to strengthen its mining equipment business, where it lacks underground mining gear, in order to secure sustainable growth.

3. -- Intel (INTC - Get Report) topped second-quarter earnings estimates thanks to a 61.8% gross margin and a drop in operating expenses. But the stock was falling 3.4% in premarket trading on Thursday after the chip giant's Data Center Group, which supplies server CPUs, saw weak revenue growth.

The stock fell 2.1% in premarket trading on Thursday.

The Data Center Group, trumpeted as Intel's long-term growth engine as PC sales remain weak, saw revenue in the second quarter grow 5% annually to $4.03 billion. That's a slowdown from growth of 9% in the first quarter, and is short of the 15% compound annual growth rate Intel has been targeting for that business from 2014-2018.  

4. -- Shares of General Motors (GM - Get Report)  jumped almost 6% in premarket trading after posting second-quarter adjusted earnings of $1.86 a share, well above estimates of $1.52.

Revenue in the quarter was $42.4 billion, topping forecasts of $38.2 billion.

Other earnings expected Thursday include AT&T (T - Get Report) , Chipotle Mexican Grill (CMG - Get Report) , PayPal (PYPL - Get Report)  and Starbucks (SBUX - Get Report) .

PayPal and Starbucks are holdings in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio . Want to be alerted before Cramer buys or sells PYPL or SBUX? Learn more now. 

5. -- U.S. stock futures were mixed Thursday after the Dow Jones Industrial Average clocked its seventh straight record close Wednesday amid better-than-expected earnings from Microsoft (MSFT - Get Report)  .

Weekly jobless claims in the U.S. fell 1,000 to 253,000, below expectations of 265,000.  

European markets fell Thursday after the European Central Bank, in its first meeting since the U.K. voted to leave the European Union, opted to leave interest rates unchanged.