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  Friday, 2 Jun 2017 | 11:44 AM ET

How to update your Twitter privacy settings

Posted ByNick Wells

In May, Twitter announced some changes coming to its data controls and privacy policy. Going forward, users can opt out of tracking and have a say in how their personal data are shared.

Users are now able to correct any mistakes in the way Twitter has you categorized, so you can help the company — and its advertisers — out by deselecting categories that don't apply to you. The changes also allow Twitter to serve you ads that are more targeted to your demographic.

CNBC's Eric Chemi checked out the changes to Twitter's policy by looking at the accounts of some of CNBC's on-air talent.

Here's how to see who Twitter thinks you are, and how to opt out if you don't want to be tracked or receive targeted advertising.

Using the iPhone Twitter app, click the gear symbol and click "Settings and privacy."

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  Wednesday, 31 May 2017 | 11:41 AM ET

The tech buzzwords taking over Wall Street earnings calls

At the Sohn Investment Conference in May, hedge fund manager David Einhorn presented his idea, shorting oilfield services firm Core Laboratories. One factor he cited in going against the company was how each year its communications to investors described a new corporate focus: "Canadian oil sands," "deepwater" and "international crude" were all featured in years past.

"Reading Core's annual reports is like opening a time capsule preserving the history of energy market hype. You'd almost expect them to start talking about machine learning," Einhorn said, before showing a slide of just that.

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  Saturday, 27 May 2017 | 9:11 AM ET

Why meal kit subscriptions like Blue Apron don't stand the test of time with new consumers

Posted ByNick Wells

Meal kits are practically everywhere, but data suggest consumers might be getting their fill.

Proponents say they're convenient, healthy and more cost-effective than taking the family out for dinner. Yet some new figures obtained by CNBC show their explosive growth is tempering, with early adopters soon giving up the convenience of customized meal prep at home.

More than half of meal kit subscribers cancel their subscriptions within the first six months, according to data from Cardlytics, a purchase analytics firm, suggesting consumers treat their food services much like a New Year's resolution to join a gym.

In fact, nearly three-quarters of new subscribers gave up the services within a year. For that portion of the study, Cardlytics looked at around 45,000 consumers who first signed up for meal kit services in January 2016.

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  Saturday, 27 May 2017 | 3:03 PM ET

For Amazon and Alphabet, the road to a $1000 share price is paved with this big risk

Posted ByEric Chemi

With Amazon and Alphabet shares hovering around $1000, there's been plenty of debate about whether the stocks should be split, at least for the benefit of retail investors who may want to buy at lower prices.

However, there's another important factor to consider: High stock prices could leave the door open for potential market manipulation.

That's according to Michael Friedman, General Counsel at electronic trading firm Trillium. Friedman is a securities lawyer and a software designer who wrote a software program to detect manipulation.

According to Friedman's logic, it simply comes down to size. When share prices are very high, order books are very thin. That means there are very few bids and very few offers waiting to be executed in the market. Any single trade can bump the price around.

More bumps mean more chances for manipulation. Examples include layering and spoofing, where artificial orders are submitted but canceled right before execution. These are ways of shifting where the market price heads.

Many other experts have also pointed out that thinly traded stocks are ripe for such problems. It's about the number of shares traded, regardless of market cap.

Friedman told CNBC that exchanges operate best when stocks are between $20 and $80, optimizing the order book and efficiency across other trading platforms. Because stock prices can only move 1 penny at a time, Friedman says the ideal stock price is one that allows for a reasonable number of shares to trade at each penny level.

Over 150 stocks in the S&P 500 Index closed Friday with share prices above $100. Including 15 stocks above $300.

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  Thursday, 25 May 2017 | 1:07 PM ET

Chicago Cubs owner tells CNBC the fear of terrorism keeps him up at night

Posted ByEric Chemi

Chicago Cubs owner Tom Ricketts told CNBC that the thing that's most concerning to him right is stadium security.

This is just days after the terrorist bombing in Manchester, England, outside a concert venue.

"Given things that have happened recently, we want to make sure we're providing a safe environment for people," Ricketts said Wednesday night.

"We're working very hard on security around Wrigley," he continued. Ricketts noticed other teams around the league are focused on similar issues. Wrigley Field, where the Cubs play, was built in 1914, and is the second-oldest active stadium in Major League Baseball.

Ricketts mentioned the "nature of the randomness of some of the things that have happened," and that he and the team "just want to make sure that we're doing everything we can."

Ricketts was speaking in New York at the Sports Business Awards, where the Cubs won the award for Sports Team of the Year, after ending their century-long World Series drought. The awards also gave Dallas Cowboys owner Jerry Jones a lifetime achievement award.

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  Wednesday, 17 May 2017 | 12:17 PM ET

Facebook IPO at 5 years and $1 trillion worth of lost productivity

Thursday will mark a full five years since Facebook went public. Since then, billions of people spending time on the social network could have added $1 trillion to the North American economy instead, according to a CNBC analysis.

If everybody in the U.S. and Canada spent their time working a minimum wage job instead of "liking" and "friending" each other, they could have increased productivity by about $1.03 trillion, with $5 trillion more possible across the globe.

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