Based on the charts, at least 10 out of the top 19 components (by market cap) in the Financial Sector (XLF) show the similar trend. One of the reason could be the potential tax reform which already approved by the Senate. You can read more at here.
From the Finviz.com Group which track the sector performance by period, Financial sector ranked top 3 in 1 month and 3 month performance. In last week performance, it ranked top 4.
Can the Financial Sector going to be bullish in the coming weeks, we shall see. It is going to be one of my sector in my watchlist to research further.