Southwest Bancorp to commence exchange offer.

Vista-based Southwest Bancorp, the holding company for Southwest Bank, will offer 11 shares of its common stock for each of its 108,710 shares of preferred stock in an offering that will begin today and continue until April 17. Southwest completed a similar stock swap offering just over two years ago, when it offered seven shares of common for each of its 200,000 then-outstanding shares. That offering attracted 91,000 shares of preferred stock.