This is what you need to know on Tuesday:

1. European stocks open weaker Tuesday as global investors pull cash from equity markets around the world amid rising political and military tensions between the U.S. and North Korea and renewed electoral uncertainty on the Continent.

2. Global oil markets were active again in Asia trading, taking Brent crude past a two-year high, after Turkey threatened to cut off supply lines from the northern Iraqi region of Kurdistan amid a growing international controversy over its plans for a referendum on independence.

3. Nestle SA (NSRGY)  confirmed its medium-term organic growth target Tuesday and boosted its profit margin aims ahead of the group's investor day in London that is expected to highlight some of the pressure recently applied by activist shareholder Third Point LLC.

4. Currency moves are likely to drive two key markets in the region as investors opt for safe-haven assets following North Korea's assertion late Monday that it considered President Donald Trump's rhetoric a "declaration of war" and threatened to shoot down any U.S. warplanes near its airspace.

5. Early indications from U.S. equity futures suggest another day in the red for the Dow Jones Industrial Average, which is priced to fall around 20 points, or 0.21%, at the opening bell while the broader S&P 500 is currently priced for a 0.09% decline as of 06:15 London time.

Watch More with TheStreet: