2019 has been mooted to be the year of tech "unicorn" IPOs. Lyft has kick-started what is expected to be a flurry of high profile IPOs in the US, including fellow ride-hailing app Uber, image-sharing platform Pinterest and messaging app Slack. But as shown through the volatility of Lyft's share price during its first week of trading, sometimes the high values ascribed to companies by private investors do not always correlate to the same value in the more scrutinised public markets where a company's valuation is not just defined by those who want buy in to the business but also by those who want to bet against it.

It remains to be seen how Lyft's early share performance will affect the valuations of those unicorns expected to follow.