A weekly recap of the most interesting venture capital deals, funds and start-ups. : LogicBio Therapeutics went public this week, raising $70 million. The genome editing company develops medicines to fight rare diseases. Its stock trades on the Nasdaq under the ticket symbol "LOGC." LogicBio is based in Cambridge, Massachusetts, and had previously raised roughly $50 million in financing, led by Arix Bioscience and OrbiMed. Chinese scooter maker Niu raised $63 million in its U.S. IPO this week. The stock trades on the Nasdaq under the ticker symbol "NIU."