Good Sunday morning, and welcome to a special edition of the DealBook Briefing, where we’ll take a deep dive into Pinterest’s upcoming public offering. It’s the second of many decacorns — $10 billion-plus start-ups — to go public this year. And it could be an indicator of what’s to come during the rest of 2019. (Was this email forwarded to you? Sign up here.)

A barometer for I.P.O.s to come

What is investors’ appetite for fast-growing, highly valued start-ups that are burning cash?

Many of the world’s most prominent tech start-ups are about to find out. Lyft has already listed, Uber will head to market in May, and Slack and Postmates are expected to follow soon.

The next test comes this week with Pinterest. The digital pin board company plans to sell shares to investors and make its public market debut in the coming days.

This is a slightly different breed of unicorn. Pinterest is burning less cash than some of the other big names going public this year, like Lyft and Uber. And it expects to price its I.P.O. below its last private market valuation.