Stock futures were flat on Tuesday as Wall Street opened the vacation-shortened week with the S&P 500 at a record high.

Futures on the Dow Jones Industrial Average fell 36 points. S&P 500 futures fell 0.1% and Nasdaq 100 futures were slightly higher. US markets were closed on Monday for Independence Day on July 4th.

West Texas Intermediate crude oil rose to a six-year high after an important meeting between the oil producing group OPEC and its partners on crude oil exploration policy was canceled. The postponement came when the United Arab Emirates rejected a proposal to extend oil production increases for a second day.

The oil surge boosted energy stocks in pre-trading. The SPDR Oil & Gas Exploration & Production ETF rose 1.8% in pre-trading. Occidental Petroleum, APA, and ConocoPhillips stocks were all higher.

U.S. shares in Chinese ride-hailing giant Didi plunged up to 25% in premarket trading after China said new users would not be able to download the app until a cybersecurity clearance was conducted. The announcement surprised the markets as Didi only made his US debut on the NYSE last week.

The S&P 500 has had a seven-day winning streak, the longest since August, amid a string of solid economic reports, including a better-than-expected job report on Friday. The tech-heavy Nasdaq Composite also hit a record high in the previous session.

The economy created 850,000 jobs last month, according to the Bureau of Labor Statistics. Economists polled by Dow Jones expected an increase of 706,000.

Still, after a strong first half performance amid a historic economic reopening, many on Wall Street expect smaller and more troubled gains for the remainder of the year. The S&P 500 is up nearly 16% since the start of the year.

“The US economy is booming, but we know it by now and the asset markets reflect it. Which is no longer so clear what price this growth will come at, “said Michael Wilson, chief strategist for US equities at Morgan Stanley, in a note.

“Higher costs mean lower profits, another reason the overall stock market has narrowed … Stock markets will likely pause this summer as things heat up,” said Wilson.

Wall Street’s consensus target for the S&P 500 is 4,276, a loss of nearly 2% from Friday’s closing price of 4,352.34, according to the CNBC Market Strategist Survey, which rounds up the predictions of 16 top strategists.

Investors await the release of the June Federal Open Markets Committee’s minutes of the June meeting for clues to the central bank’s behind-the-scenes discussions on the abolition of its quantitative easing program.