Just recently, Bitfinex announced that USD deposits will be rejected until further notice. In combination with their previous notice blocking USD withdrawals, this means that Bitfinex is no longer a viable USD/Bitcoin exchange, and we expect the pricing discrepancy between Bitfinex and other exchanges to increase as traders attempt to withdraw via cryptocurrencies.
For this reason, we are weighting Bitfinex to 0 in the .BXBT Index, effective at 16:00 UTC today (30 minutes from the time of this post). In combination with the prior temporary suspension of GDAX from the index due to pricing discrepancies, this means that for the time being, the old .XBT index and the new .BXBT index will print the same prices.