Waterstone Financial Inc., the holding company for WaterStone Bank, saw profits soar during the final quarter of fiscal 2016. The Wauwatosa-based company on Friday reported net income of $6.4 million for the fourth quarter ended Dec. 31, 2016, or 23 cents per share, a 109.1 percent increase compared with $3.1 million, or 11 cents per share, during the same period a year ago.