The Black Scholes option pricing formula can be applied to warrants, but it is misleading in some ways for a stock like NCU. See below:
This is my quick attempt to price the A series warrants that expire in July 2022. Note I did this yesterday and had the current share price at .23 . Aside from the relevant prices, the two important variables are the risk free discount rate (which arguably is like the price of Canada or US t-bills or bonds) and the volatility of the stock.
But the key here for NCU is not volatility, but rather upside potential. I cannot envision a scenario, other than an earthquake that destroys the mine or a black swan underground, in which the price of these shares falls from, say, .23 for very long. In fact the voatility is all to the upside, that is, potential gains, not just variation. If the potential gains are subjectively recognized by the buyer, it is very easy to justify a much higher price for the warrants. I hold a large bag of A warrants and the common shares.