But that is not what should be occupying the minds of investors right now.

Loading

The big question for those who bought millions of shares at $30 a pop on Thursday is: what does the company have to do to justify this price?

The answer: it had to meet some pretty astounding growth targets to justify its valuation even before its soaring debut on Thursday.

The big goal – aside from exporting its Mexican-inspired business from Australia to the world – is to grow its Australian footprint from 185 stores to more than 1000. This would match the local footprint of fast food giant McDonald’s.

This would also give it a bigger footprint than pizza juggernaut Domino’s, which has about 700 outlets in Australia and a $3.3 billion valuation from 3800 stores globally.

Loading

For Marks and GYG, the aspirational comparison is US/Mexican fast food giant Chipotle, with a market valuation of $US88 billion ($132 billion) and 3500 stores.

The good news is that Marks, who has been a promotional dynamo for the business, has as much on the line as any other investor.

He did not sell any shares into the public offering and watched as the value of his shares and options soared to $300 million as of Thursday’s closing share price.

It means he is completely exposed to the roller-coaster ride that will ensue if GYG does not hit its very aggressive growth targets.

And speaking of growth targets, it might not be a coincidence that the share price deflated more than 5 per cent on Friday morning when the Australian Financial Review unveiled documents from GYG shareholder TDM Growth Partners dated from 2018 with earnings and store-growth targets for the 2022 and 2023 financial years.

While these forecasts were not from GYG itself, the AFR reports that GYG fell short on both the store count and earnings forecasts ahead of the IPO.

It could also be views from analysts like Morningstar’s Johannes Faul, who initiated coverage with a fair value of just $15 per share.

“Guzman looks expensive,” Faul said. “We think the market takes a different view on Guzman’s long-run prospects – namely, how long the company can keep building stores that generate excess returns. Granted, Guzman’s Australian restaurant economics are very attractive now.”

But maybe the final word should belong to Marks, who knows exactly what the risks and rewards are.

“Obviously, we can’t choose if people buy or sell,” he said after the stock’s debut on Thursday. “We [have] just got to run our business and make sure that, you know, as a senior leadership team, that we deliver [on the] strategy.”

The Business Briefing newsletter delivers major stories, exclusive coverage and expert opinion. Sign up to get it every weekday morning.