The price of bitcoin topped $400 on the CoinDesk USD Bitcoin Price Index today, its highest value over the last four weeks.
The press time value of $401.83 represented the highest bitcoin price observed since 5th November, when the price hit a high of $447.25 across major USD exchanges including Bitstamp, Bitfinex, Coinbase, itBit and OKCoin.
Data shows the price began its most rapid runup at 22:30 UTC on 5th December, when the price rose abruptly from $377.49 to $385.93 over a 10-minute period. So far, the price rally has continued into 6th December, with bitcoin’s value up 3% over the day’s trading.
http://www.coindesk.com/bitcoin-400-one-month-high/