End of the Chinese year, US senate hearing at the end of the month
IMHO much of the effect of end of Chinese new year (no more fiat withdrawal from exchanges) has been mostly absorbed into the price by now. I imagine the the Chinese who still have BTC will now be hodling regardless, otherwise why wait until the 31st to sell?
US hearings could have an impact though, since if there's a lot of people in fiat waiting the see what the end of the month brings....
Also, correct me if I'm wrong but it's not the US senate but the New York State Department of Financial Services that is meeting to discuss BTC this month.
Source:
http://www.coindesk.com/new-york-state-announces-bitcoin-hearings/