Roku’s 200% surge this year has made the stock too expensive, analyst says

Roku has tripled in value this year, outperforming almost every notable technology stock, and Kyle Evans of investment bank Stephens says the rally has finally gone too far.

Evans downgraded his rating on Roku toequalweight from overweight, citing too much near-term risk to the stock after the run-up that pushed the streaming video company to a market cap of about $11 billion. The analyst pointed to last years third-quarter results and Rokus slight miss in platform revenue, which sent the stock down 22%.

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Amazon removes books promoting dangerous bleach ‘cures’ for autism and other conditions

Amazon has removed more than a dozen books that unscientifically claim a homemade bleach, chlorine dioxide, can cure conditions ranging from malaria to childhood autism. The books include directions for making and ingesting the concoction, which doctors and federal regulators have warned is dangerous.

Amazon confirmed Tuesday that it was no longer selling the books on the topic of chlorine dioxide — a hazardous mix of sodium chlorite and an acid activator such as citric acid, also marketed as Miracle Mineral Solution, or MMS. The Food and Drug Administration has warned consumers that the so-called cure amounts to industrial bleach, has no possible health benefits and can cause permanent harm.

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The hot trend in smartphones? Not buying a new one

The smartphone industry has a two-part plan to tackle a global slowdown in sales: sell a pricey new type of mobile device that is able to transform into a tablet, and promote phones that can support super high-speed mobile internet standard 5G.

But those flashy new features may not be enough to sway people to trade in their old phones immediately, as long as theyre in good condition.

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MacKenzie Bezos pledges to give away at least half of her $37 billion fortune to charity

MacKenzie Bezos joined some of the worlds wealthiest people in a pledge to give away at least half of their wealth to charitable causes.

The Giving Pledge, which was started by Warren Buffett and Bill and Melinda Gates in 2010, announced Bezos commitment Tuesday.ÂBillionaire hedge fund manager Paul Tudor Jones also announced on Tuesday that he and his wife have signed it. His wealth is estimated by Forbes at more than $5 billion.

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Tax delays and canceled home sales: The costly ripple effects of today’s cyber-attacks

On May 7, accounting software company Wolters Kluwer faced a devastating malware attack, shutting off service and panicking many accountants who were racing to file their clients tax returns by a May 15 deadline.

As CNBC reported, some accountants worried they were going to have to file returns by hand. The IRS eventually extended the deadline an unprecedented seven days.

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Huawei says FedEx diverted packages to the US and will reevaluate its relationship with the shipper

Chinese telecoms equipment maker Huawei is reviewing its relationship with FedEx after it claimed the U.S. package delivery company, without detailed explanation, diverted two parcels destined for Huawei addresses in Asia to the United States and attempted to reroute two others.

Huawei told Reuters on Friday that FedEx diverted two packages sent from Japan and addressed to Huawei in China to the United States, and attempted to divert two more packages sent from Vietnam to Huawei offices elsewhere in Asia, all without authorization, providing images of FedEx tracking records.

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If China and the US split the tech world, that could come at a cost to consumers

If the ongoing tensions between Beijing and Washington force companies to develop two different sets of technologies — one for China and its aligned countries, and the other for the rest of the world — then it would be bad news for everyone, according to a senior executive at a multinational tech firm.

That is, the development of technology would become more expensive, Mahendra Negi, chief financial officer at Trend Micro, told CNBCsStreet Signs on Tuesday. His company develops cybersecurity software that can protect corporate data from hackers.

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