** Shares in PSI Software PSAGn.DE jump 34% and are on track for their biggest one-day rise ever after private equity firm Warburg Pincus said it planned to buy the German software firm for more than 700 million euros ($812 million)
** Reuters first reported on a nearing takeover of PSI on Thursday, sending its shares 22% higher; the stock rose further 11% on Friday
** Warburg Pincus' deal will value PSI at 45 euros a share, a premium of about 50% from the software company's closing price on Thursday
** Stock is at its highest price since January 2022
($1 = 0.8616 euros)