U.S. stock index futures were lower on Tuesday as prices of commodities fell on rekindled worries about demand from China.

* Investors are awaiting a barrage of quarterly results and a speech by Federal Reserve Chair Janet Yellen.

* Third-quarter company earnings are in full focus this week with Verizon (VZ.N), Yahoo (YHOO.O) and VMware (VMW.N) reporting results on Tuesday.

* Investors are pricing in tepid corporate performance for the quarter and watching out for outlook commentary as the effects of global financial turbulence hits American shores.

* S&P 500 companies are expected to show a 3.9 percent fall in third-quarter profit, according to Thomson Reuters data.

* U.S. stocks closed with slight gains on Monday as tech and biotech stocks advanced ahead of a heavy week of earnings.

* Brent crude fell on Tuesday but steadied around $48 a barrel and London copper prices slipped to two-week lows straining under an economic slowdown in China. [O/R] [MET/L]

* Exxon's shares (XOM.N) were down 1.8 percent at $80.99 premarket.

* IBM (IBM.N) fell 4.7 percent to $142.15 a day after it reported a bigger-than-expected fall in quarterly revenue and cut its full-year profit forecast.

* Sandisk (SNDK.O) jumped 8.1 percent to $77.82 after a Reuters report said Western Digital (WDC.O) was in advanced talks to buy the memory chipmaker, citing people familiar with the matter.

* Yum Brands (YUM.N) rose 4.3 percent to $74.76 after the fast food group said it was preparing to separate its China business.

* Travelers (TRV.N) rose 0.6 percent to $107.00 after it reported a rise in third-quarter profit. * Data on housing starts is scheduled for release on Tuesday at 8:30 a.m. ET. The data is expected to show 1.15 million units were started in September, up from the 1.13 million units in August.

* Yellen speaks at 11:00 a.m. ET. Fed Board Governor Jerome Powell is also scheduled to speak on Tuesday.

* S&P 500 e-minis ESc1 were down 7 points, or 0.35 percent, with 84,232 contracts traded.

* Nasdaq 100 e-minis NQc1 were down 12.5 points, or 0.28 percent, on volume of 13,227 contracts.

* Dow e-minis 1YMc1 were down 60 points, or 0.35 percent, with 11,349 contracts changing hands.

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Zuhair from the U.S has won 8/8 from his trades by using our Signals and Professional advice from our agent Joe.

We want to thank Zuhair for sharing his good experience with us.

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Busy day ahead. 

Here are 4 tips for today's trading. This will help you decide where you should invest and what to look for:

1. Earnings season

A range of companies including Verizon (VZ, Tech30), Travelers (TRV) and Harley-Davidson (HOG) are reporting earnings this morning.

After the markets close, another batch of companies are reporting, including Chipotle (CMG) and Yahoo (YHOO, Tech30).

Shares in IBM (IBM, Tech30) are declining by about 4% premarket after the company posted disappointing quarterly results on Monday afternoon. Revenue came in below expectations, in part due to the slowdown in Asia.

2. Oh Canada

Canadians have voted in their first new leader in 10 years. Justin Trudeau is the son of a former Canadian prime minister. He led his Liberal party to a majority government, dealing a stunning blow to incumbent leader Stephen Harper.

The Toronto Stock Exchange could react sharply when trading opens.

3. Stocks in the spotlight

Sandisk, United: Takeover talk has sent Sandisk's (SNDK) share price climbing 8% premarket. Western Digital (WDC) is reportedly in serious talks to acquire the chipmaker and a deal could be announced this week. Micron (MU) had been considered another suitor for the firm.

Shares in United Continental Holdings (UAL) could be on the move Tuesday after the firm announced its general counsel Brett Hart would lead the company on an interim basis after the CEO suffered a heart attack last week and was put on medical leave.

"At this time, it is too soon to know the course of treatment and timing of recovery," the airline said.

Shares in Takata took a hit Tuesday in Japan -- down 3.4% -- on concerns that the company may be forced to expand a recall of its defective airbags in the U.S.

4. Stock market overview

U.S. stock futures are declining by about 0.3% and most European markets are dipping into the red in early trading.

Asian markets ended with mixed results.

On Monday, the Dow Jones industrial average edged up 0.1% and the Nasdaq added 0.4%. The S&P 500 didn't make any significant move.

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What is it? It's a leading indicator of the nation's trade balance with other countries because rising commodity prices boost export income.

When? Tentative

Trading Tip: If the actual number is higher than the forecast, you can expect the NZD to rise.

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