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Happy Valentine's Day! If you bought a box of chocolates for your sweetheart, you probably paid less than in years past, with cocoa prices down because of swelling supply. The cost of going all-in on the holiday (a dozen roses, a spa visit, fancy dinner, a movie and a luxury hotel) varies greatly from city to city; Los Angelenos will spend the most, more than twice the cost in Prague. But before you open your wallet, financial service marketers will warn you to reconsider the costs. –Emily Banks

The world is getting better, despite what you may read in headlines, says Melinda Gates. The businesswoman and philanthropist, in a Q&A with Bloomberg Businessweek, talked about the Gates Foundation's annual letter. This year, it took the form of a letter to Warren Buffett, who 10 years ago pledged $30 billion to the foundation. She also talked about the world's missing data about women. "What we don't measure, we don't work on," she said.

Trump’s national security team is in disarray. The president undertook a hurried search for a new national security adviser and sought to calm his staff in the wake of Michael Flynn’s resignation. In his resignation letter, Flynn said he had “inadvertently” misinformed the vice president and Trump about discussing sanctions with a Russian official before the inauguration.

Kim Jong Un’s estranged brother was murdered in Malaysia, according to a South Korean government official. The official said poison was involved in the death, which took place at the Kuala Lumpur airport. Kim Jong Nam, the eldest son of former North Korean leader Kim Jong Il, had lived outside the country for years and had been critical of Kim Jong Un.

Janet Yellen said more interest-rate increases will be appropriate if the economy stays on course. The Fed chair gave no indication of the timing of the next hike in her prepared remarks for today's semiannual report on monetary policy. Investors see about a 30 percent chance of an increase at the next meeting of the FOMC in March.

Your boss can legally track you everywhere but the bathroom; new office sensors know when you leave your desk. Proponents claim the goal is efficiency. Some sensors generate heat maps that show how people move through an office, to help maximize space. Legally speaking, U.S. businesses are within their rights to go full-on Eye of Sauron.

Millennials don't move much. Americans 25 to 35 years old are changing homes a lot less than previous generations did at the same ages, according to Census data tabulated by the Pew Research Center. It may be that the job market is weaker today, at least in parts of the country, than the national unemployment numbers say, or it may be that millennials are frozen in place by a housing market that’s still short of supply.

This $6.9 million villa comes with its own private island. Sometime in 2014, French-born, Dubai-based, real estate developer Blaise Carroz decided to buy his own island. The spot, Melody Key, is a small patch of land in the Florida Keys. The island has about three acres of walkable land and an equal amount of submerged land, plus a 3,500-square-foot main villa that comes with three bedrooms and three full baths, kitchen, large living room, and elevator servicing all three floors.

The main house is three stories, and has an elevator.
Photograph: Engel & Völkers
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