The splash page for Yahoo and Tumbler on an iPhone ©AFP 11:40pm

Yahoo buys start-up Tumblr for $1bn

Move is first big bet by new CEO Marissa Mayer

From UK 8:31pm

Ex-employee set to reveal Google’s tax plans

Former sales executive ready to hand over documents to HMRC

People walk past the Apple logo at the Apple Store at Grand Central Terminal in New York ON January 25, 2013. Apple shares slid about 12 percent on January 24 after the tech giant posted record profits and sales of its iPhones and iPads but offered a disappointing forecast for the coming months. ©AFP From PERSONAL FINANCE 6:59pm

Apple faces grilling over US tax rate

Accounting lowered tech group’s payment from 15% to 25%

Weird computer ©Alamy From COMMENT 3:22pm

China: More crooks than patriots

The biggest threat is posed by online criminals the state is ill-equipped to police, says Kathrin Hille

BP Full Year Earnings Press Conference...Tony Hayward, chief executive officer of BP Plc., pauses during the company's press conference to announce their full year results in London, U.K., on Tuesday, Feb. 2, 2010. BP Plc, Europe's biggest oil company, expects the recovery from last year's recession to be "slow and gradual" as fourth-quarter earnings missed analyst estimates. Photographer: ©Bloomberg Week in Review from ENERGY May 17, 2013

Week in review, May 18

Hayward likes life ‘on the edge’

From FINANCIALS May 17, 2013

UBS bankers raise concerns about chat groups

Bankers warned about putting client information on external platforms

From MANAGEMENT May 17, 2013

Companies see innovation without results

Aversion to risk leads to missed opportunities

A Chinese young woman surfing the net at an internet bar in Beijing China ©AFP From LEX May 17, 2013

Tencent: phone company killer

Chinese internet group battles the country’s mobile phone operators

Elon Musk, chief executive officer of Tesla Motors Inc., speaks during a Bloomberg West Television interview at the company's headquarters in Palo Alto, California, U.S., on Tuesday, April 2, 2013 ©Bloomberg May 16, 2013

Elon Musk raises $1.3bn for green tech

Wave of interest for Tesla Motors and SolarCity

From LEX May 16, 2013

Google: $900 breached

Can the internet search giant avoid Apple’s steep share price drop?

May 16, 2013

Yahoo spared $2.7bn Mexican damages

Mexican court overturns ruling in contract dispute

May 16, 2013

Dell earnings fall short of expectations

First-quarter profits tumble as PC sales slide

May 16, 2013

VC backing gets smart watch ticking

Kickstarter-born company raises $15m

From UK May 16, 2013

LulzSec hackers jailed for cyber attacks

Group launched successful attacks on the CIA, FBI and Sony

From FINANCIALS May 16, 2013

BNP launches full-service mobile bank

‘Hello’ brand aims to have 1.4m customers by 2017

Personal Technology from MANAGEMENT May 16, 2013

Gadgets not required at Google jamboree

New and updated sofware from this year’s I/O

From LEX May 16, 2013

Intel: upwardly mobile

US chipmaker gears up for big push into mobile devices

From MEDIA May 16, 2013

‘Facebook fatigue’ stirs investor concern

Under-25s using rival services as older relatives arrive on site

May 16, 2013

Google chief touts utopian ambitions

Tech vision where ‘being negative is not how we make progress’

May 16, 2013

China in innovation challenge to Europe

Continent’s business leaders voice fears

FT techfeed