Market volatility at the end of this year put a pause on the initial-public-offering pipeline, but tech investment bankers expect the deals to flow at the turn of the calendar year. With a long list of marquee names including Uber and Lyft, IPOs in 2019 could set record highs in terms of valuations and exits for Silicon Valley venture capitalists. But VCs aren't the only ones set to win. Bankers expect to see private-equity firms try their hands at tapping the public markets as well.