Here are five things you must know for Friday, Aug. 17:

1. -- Stock Futures Slip After Dow Posts 400-Point Rally

U.S. stock futures slipped on Friday, Aug. 17, following a jump of nearly 400 points in the Dow Jones Industrial Average I:DJI during the previous session after China and the U.S. agreed to hold trade talks next week and Walmart Inc. (WMT) - Get Report topped earnings estimates and raised guidance.

Contracts tied to the Dow fell 14 points, futures for the S&P 500 I:GSPC  declined 2.50 points, and Nasdaq I:IXIC futures fell 10.25 points.

The Dow ended Thursday, Aug. 16, up 396 points, or 1.58%, to 25,558, the S&P 500 gained 0.79% and the Nasdaq added 0.42%.

The meeting between China and the U.S. will take place next week as the world's two largest economies ready tariffs on billions of dollars of each other's goods on Aug. 23, on top of those already levied on July 6.

The economic calendar in the U.S. on Friday includes Consumer Sentiment for August at 10 a.m. ET, and Leading Indicators for July at 10 a.m.

Deere & Co. (DE) - Get Report posted fiscal third-quarter revenue of $10.31 billion, up 32% from a year earlier and above forecasts of $10.22 billion, but sales growth guidance for fiscal 2018 came in below Wall Street forecasts. Adjusted earnings in the third quarter were $2.59 a share vs. expectations of $2.73. The stock fell 5.4% in premarket trading.

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2. -- Nvidia Tumbles on Weak Revenue Guidance

Nvidia Corp. (NVDA) - Get Report  fell 3.4% in premarket trading after the chipmaker beat earnings and sales estimates for its fiscal second quarter but issued weaker-than-expected third-quarter guidance because of declining demand for cryptocurrencies.

Nvidia posted GAAP earnings of $1.76 a share, beating Wall Street's expectations of $1.65. Revenue was $3.12 billion, beating consensus expectations of $3.1 billion.

Even though Nvidia raised its guidance for the third quarter, those estimates still came in lower than Wall Street forecasts. Revenue guidance for the quarter was $3.25 billion, plus or minus 2%, which was below a $3.34 billion consensus.

Nvidia, which in May forecast that sales of products meant specifically for crypto miners would fall by about two-thirds sequentially in the second quarter from the first-quarter's level of $289 million, did just $18 million in such sales last quarter. That led revenue for Nvidia's OEM & IP reporting segment, which also covers sales of non-gaming PC GPUs and patent licensing revenue, to drop 54% from a year earlier to $116 million, easily missing analysts' estimates of $188 million.

Nvidia also said it was "projecting no contributions" from crypto-specific products going forward.

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"We continue to see longer-term upside based on the company's significant exposure to the cloud, gaming, autonomous driving and pro visualization," wrote Cramer and the AAP team. "The more data that transfers to the cloud, the more demand we expect to see for the chips required for GPU-acceleration."

3. -- Nordstrom Jumps as Sales Beat Estimates

Nordstrom Inc.'s  (JWN) - Get Report  second-quarter earnings and sales beat analysts' estimates and the retailer raised its fiscal-year guidance. The stock jumped 9% in premarket trading on Friday.

Profit in the quarter was 95 cents a share, higher than year-earlier earnings of 65 cents. Revenue rose 7.1% to $4.07 billion. Comparable-store sales rose 4%.

Nordstrom said it expects fiscal-year earnings of $3.50 to $3.65 a share, up from previous guidance of $3.35 and $3.55 a share. The company revised its sales forecast as well, saying it expects revenue between $15.4 billion and $15.5 billion vs. a previous estimate of $15.2 billion to $15.4 billion. Nordstrom also estimates same-store sales will rise 1.5% to 2% compared with its previous outlook that called for a 0.5% to 1.5% increase.

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Overall, it was a great quarter from the company as they blew away expectations," wrote Cramer and the AAP team. "There was no real weakness in comps as both full line and off-price delivered strong results, and it is becoming clearer and clearer that past generational investments in digital are really beginning to pay off."

4. -- Elon Musk Says Tweet Was Attempt at Transparency

Elon Musk wasn't high when he sent a tweet last week that declared his hope to take publicly traded Tesla Inc. (TSLA) - Get Report  private.

In an interview with The New York Times, the Tesla CEO said when he tweeted that he was considering taking the electric vehicle company private at $420 a share, he wasn't making a reference to marijuana (420 is a number that has become code for marijuana) but was rounding up to a 20% premium on where the stock had been recently trading. 

"It seemed like better karma at $420 than at $419," he said in the interview. "But I was not on weed, to be clear. Weed is not helpful for productivity. There's a reason for the word 'stoned.' You just sit there like a stone on weed."

Tesla shares closed Thursday at $335.45 and were down 2.5% in premarket trading on Friday.

The Aug. 7 tweet, which has set off a probe by the Securities and Exchange Commission, was an attempt at transparency, Musk told the newspaper, adding that no one reviewed it before it was posted.

The SEC has subpoenaed Tesla, The Wall Street Journal reported, and is seeking information from each Tesla board member. It is now a formal investigation, a step up from what previous reports said was a mere inquiry the SEC put into Tesla. 

5. -- Google CEO Says 'Not Close' to Launching Search Product in China

Google CEO Sundar Pichai, at an internal meeting on Thursday, said he was interested in continuing to expand the company's services in China, but told employees that Google was "not close" to launching a search product there and that whether it would - or could - "is all very unclear,' CNBC reported.

Pichai's remarks, shared with CNBC by a Google employee, follow internal and external backlash following a report from The Intercept in early August that Google, a subsidiary of Alphabet Inc. (GOOGL) - Get Report , was secretly building a censored version of its search engine to launch in China. 

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