Complex sentence: The bank's largest clients had been approached and they were convinced they could swing a deal, confidence was so high even a press release was being written up in anticipation of an announcement until then Chairman Jim Robinson inexplicably changed his mind.
Split into simpler sentences: The bank's largest clients had been approached, and they were convinced they could swing a deal. Confidence was so high even a press release was being written up in anticipation of an announcement until then Chairman Jim Robinson inexplicably changed his mind.