Sometimes the issuer will try to establish a market for the warrant and to register it with a listed exchange. In this case, the price can be obtained from a broker. But often, warrants are privately held or not registered, which makes their prices less obvious. Once the warrants are in the secondary market, they can then be traded just like a stock. Warrants can be easily tracked by adding a "w" after the company’s ticker symbol to check the warrant's price.
Duration
Another difference between a warrant and an option is the duration of the contract. A warrant's lifetime is measured in years (as long as 15 years), while options are typically measured in months. Even LEAPS (long-term equity anticipation securities), the longest stock options available, tend to expire in two or three years. Upon expiration, the warrants are worthless if not exercised unless the price of the common stock is greater than the exercised price.
Other differences
In many respects, options and warrants are functionally similar, except that warrants are not standardised like ASX-listed options. While investors can write stock options on the ASX, they are not permitted to do either with ASX-listed warrants, since only companies can issue warrants, and while each option contract is over 100 underlying ordinary shares, the number of warrants that must be exercised by the holder to buy the underlying asset depends on the conversion ratio set out in the offer documentation for the warrant issue.
Nach dieser erklärung also verlieren die Warrants an Wert, sehe ich das richtig???