The numbers you need

$6.4 billion

... is the value of assets under management of exchange-traded funds (ETFs) in Australia in 2012. According to researcher Cerulli Associates, this is a rise of 33.3 per cent compared with 2011. ETFs are listed investments whose unit price mirrors or tracks the price of sharemarkets, sharemarket sectors, commodities and bonds, including precious metals such as gold. Twenty-five ETFs were launched on the Australian sharemarket in 2012.

20.68 per cent

... is how far shares in Breville have risen so far this quarter, making it the best performer on the ASX 200. Shares in the electrical goods maker, less than $5.50 in March, are trading above $7.

£20

... is how much some British prostitutes are charging. According to The Economist, the troubled economy is driving more women into prostitution, with the market becoming so saturated that prices are plummeting. "It's stupidly competitive right now," one working woman says. Some "backstreet" sex workers are charging as little as £20 ($31).