Investors took a cautious approach to transit software startup Via’s IPO on Friday, with shares opening below the company’s IPO price before recovering at the end of the day slightly higher. The company, which initially filed confidentially for IPO in July, priced its IPO at $46 per share, raising $492.9 million. Those shares slipped to $44 when the stock began trading Friday afternoon, and then inched back into the green to finish at just over $49. The modest gain values Via at roughly $3.9 bil...