CoinDesk Bitcoin Price Index

Info on how this value was calculated
Based on the following values:
USD:
BTC-e$491.00
Bitstamp$499.99
Bitfinex$500.53
CNY:
BTC China¥3,134.34
OKCoin¥3,136.13
Last updated: Apr 21, 2014 at 16:23 BST