Taking stock: A round-up of those whose worth went up or down this week
Madison Keys won a million hearts by beating Venus Williams in the Australian Open, while the Russian President's value went drastically down among his countrymen.

Madison Keys
UP
The 19-year-old unseeded American player beat Venus Williams in the quarterfinals of the Australian Open 2015. She will play Serena Williams in her first Grand Slam semifinal.
UP
Apple has just reported its biggest quarter in the company's history with a net income of $18 billion.
Vladimir Putin
DOWN
A UK public inquiry on Tuesday called the Russian President a "common criminal dressed up as a head of state" who allegedly personally authorised the murder of the former Russian spy Alexander Litvinenko eight years ago.
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