10 things you need to know before the opening bell

Here is what you need to know.

The 1st half is over. The tech-heavy Nasdaq 100 gained 15.33% in the first half half of 2017, compared to the S&P 500's gain of 7.48% advance.

China's manufacturing bounces back. Caixin Manufacturing PMI rose to a three-month high of 50.4, up from May's reading of 49.6 which was a one-year low.

Japanese Prime Minister Shinzo Abe suffers a big blow. Abe's Liberal Democratic Party won just 23 of 127 seats in Sunday's Tokyo assembly election, The Strait Times reports.

Saudi Arabia and its allies extend Qatar's deadline by 48 hours. Saudi Arabia, the United Arab Emirates, Bahrain and Egypt said Qatar has until midnight Tuesday to comply with their list of 13 demands to lift a de facto blockade, AFP says.

Bullish dollar bets hit their lowest level in a year. "Leveraged funds remained net USD sellers, reducing their net USD longs by $US2 billion to $US4.7 billion, the lowest since June 2016," said Irene Cheung and Rini Sen, strategists at ANZ Bank, citing US Commodity Futures Trading Commission data released on Friday.

The 10-year is testing Jeff Gundlach's 'critical level.' The US 10-year yield is up 1 basis point at 2.31%, its highest since the middle of May. On Friday, Gundlach tweeted he was watching 2.32% closely.

Elon Musk announces the delivery date for the Tesla Model 3. Tesla is on track to deliver 30 Model 3 vehicles on July 28, according to a tweet from CEO Elon Musk.

Dropbox is reportedly looking for IPO underwriters. An initial public offering could come later this year.

Economic data flows. Markit US Manufacturing PMI will be released at 9:45 a.m. ET before ISM manufacturing and construction spending cross the wires at 10 a.m. ET. US auto sales will be announced throughout the day.

US markets close early. In observance of Independence Day, US equity markets will close at 1 p.m. ET and the Treasury market will finish at 2 p.m. ET. Markets will be closed on Tuesday, July 4, and reopen Wednesday, July 5.