McGraw Hill valued at $3.25 billion as shares open flat in underwhelming debut
By Pritam Biswas (Reuters) -U.S. publisher McGraw Hill was valued at $3.25 billion as its shares opened at par in their New York debut on Thursday, hinting at a mixed response from investors in an otherwise upbeat IPO market. IPO market activity has rebounded strongly following a significant setback earlier in the year caused by…