CoinDesk Bitcoin Price Index

Info on how this value was calculated
Based on the following values:
USD:
BTC-e$497.00
Bitstamp$511.62
Bitfinex$512.05
CNY:
BTC China¥3,169.49
OKCoin¥3,181.45
Last updated: Apr 20, 2014 at 09:14 BST