To accompany its preliminary quarterly earnings guidance on Tuesday, Samsung Electronics for the first time issued an explanatory note, to address “investors’ concerns about uncertainties”. Here are some of the key issues facing shareholders after Samsung’s 24 per cent year-on-year earnings decline. Read more

Richard Waters

Venture capitalists are lining up to back bitcoin start-ups. On Monday, Xapo bagged some of Silicon Valley’s biggest names for its latest $20m round: Greylock’s Reid Hoffman and Index Ventures’ Mike Volpi, not to mention personal money from Max Levchin, Yuri Milner and Jerry Yang.

But all of this VC activity raises an interesting question. If these investors truly believe the crypto-currency will one day support a significant new financial services industry, why not just buy the currency and hold it? Read more

Online video distribution network Rightster is adding views with the bolt-on acquisitions of Viral Spiral and Base79. A placing of 75m new shares to raise £42m will help fund the deals – with a co-founder of YouTube coming on board and investing. Read more

Tim Bradshaw

Uber is wasting little time in putting last month’s huge $1.2bn fundraising to work. As it races for marketshare against not-quite-so-well-funded rivals such as Lyft, it has been cutting prices for its cheapest service, UberX, in several markets including its largest, the San Francisco Bay Area.

The fare reduction is flagged as temporary, which may be just as well: Fortune discovered that Uber is losing money on every fare by paying drivers more than it charges passengers, in order to boost their earnings and prevent them from switching to a more lucrative rival. Read more

Robert Cookson

Facebook has created a new “missed call” product for advertisers in India, marking the first time that the social network has designed a special ad format for a single country.

When a mobile phone user clicks on one of the ads, it calls the advertiser and immediately hangs up. The advertiser returns the call with pre-recorded entertainment content and a marketing message – enabling the consumer to avoid paying data charges.

Facebook’s creation of a special ad product in India, where the company has more than 100m users, is part of a broader push to develop customised solutions across emerging marketsRead more

Anthony Noto, the ex-Goldman Sachs investment banker, has just been named as Twitter’s new chief financial officer. Here are five key things to know about him, writes Arash MassoudiRead more

Hannah Kuchler

The news that Facebook manipulated its news feed to analyse the impact on users’ emotional expressions has angered many who believe they should have been told they were part of a psychology experiment.

The study of more than 689,000 Facebook users, conducted over a week in 2012, found those who were exposed to fewer positive stories in the feed were more likely to write negative posts and vice versa. People felt worried the billion plus social network was trying to manipulate their emotions, coming as it does after years of conflicts over privacy with the social network. Read more

Richard Waters

Marc Benioff, Salesforce.com chief

Salesforce.com, the company that did more than any other to invent the software-as-a-service industry, is reaching a turning point.

After years of rapid growth, it has a pressing need for the more evolved infrastructure, processes and rounded management team of the large company it has become. And with growth starting to slow, it is coming closer to a seminal moment: when investors will start expecting it to report real profits, and not just on a pro-forma basis. The appointment of a new chief financial officer on Monday is the latest sign that is preparing for the changes. Read more

Richard Waters

The US Supreme Court has rejected Google’s bid to limit the legal fall-out from the StreetView spying case.

In the process, it has also delivered its second decision in a week that interprets how the country’s privacy laws should apply when it comes to new technologies. Both times, it has come down on the side of stronger legal protections for the individual. Read more

Jack Ma, Alibaba’s founder, admitted on Sunday that he had never once used Taobao, the ebay-like flagship website for the ecommerce company he will be taking public later this year, writes Charles Clover and Ma Fangjing.

The odd sounding admission came in the middle of a rambling commencement speech to graduates of Tsinghua University on Sunday, in which he highlighted his humble origins and lack of professional experience. He needs to keep his emotional distance from his products, he said, so that he can make decisions about them objectively. And that apparently means not knowing how they work. Read more