** Chicago-based BankFinancial's BFIN.O shares rise 5.4% to $11.47
** Bigger peer First Financial Bancorp FFBC.O will buy BFIN in a $142 million all-stock deal
** BankFinancial's stockholders will receive 0.48 share of FFBC for each BFIN share held, valuing the bank's stock at $11.34 apiece
** The deal, which is expected to close in the fourth quarter of 2025, is at a premium of more than 4% to BFIN's last close
** FFBC shares up 2% at $24.13
** Two brokerages covering BFIN rate it "hold"; median PT $11.75 - data compiled by LSEG
** As of last close, BFIN stock down 14.3% YTD