US stocks index futures fell on Tuesday as concerns over employing tariffs on nearly all Chinese goods by the US kept investors on edge.

Shares of trade-sensitive Caterpillar Inc. were down 0.5 percent to $141.27, while Boeing Co. added 0.2 percent to $342.61. The planemaker has adjusted its estimate for acquisition of new planes by China for the next couple of decades by 6.2 percent.

Chipmakers, which depend on China for a large part of their revenue, were also in the red. Intel Corp. slipped 0.7 percent to $45.98, while Micron Technology Inc. stumbled 4 percent to $43.08 and NVIDIA Corp. dropped 0.4 percent to $273.47.

Chief market economist Peter Cardillo stated that the futures were pointing to a weak opening as geopolitical, trade issues continue to weigh on markets.

Would expect another trying directionless market as investors stay cautious, he added.

US equities on the other hand, started the week on a positive note with the S&P 500 gaining 0.07 percent to $2,878.92. Tech-heavy NASDAQ Composite index cut a four-day losing streak and last stood 0.2 percent higher to $7,924.16.

Dow 30 advanced 0.1 percent to $25,882.78, while S&P 500 e-minis shed 0.02 percent to $2,879.75. Nasdaq 100 e-minis was up 0.2 percent to $7,475.75.