William Blair reiterates an "Outperform" rating for NYSE:PAR, despite a 20% premarket trading drop following a $250 million convertible debt offering announcement.The $250 million convertible debt offering aims to refinance existing notes and support share buybacks, with an interest rate of 4.00% and a conversion rate at a 20% premium over the current stock price.Despite recent volatility, PAR's market capitalization remains robust at approximately $607.8 million, highlighting the company's significant mark ...