Nicky Phillips reports:
Sandwiched between a bakery and a health food supermarket in the heart of Cupertino, California, is the headquarters of a new kind of stock exchange – one that trades data, your data.
It is operated by a US company called BlueKai and at any moment on a typical day the interests and preferences of more than 200 million web users are for sale to the highest bidder.
Read more in The Age.