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This conversion feature was, in essence, a derivative financial instrument, and each quarter, the company took a loss as the value of its common shares grew. (Globe and Mail)

Each Bonus Warrant will entitle the holder to purchase one common share at a price of $0.07 per common share before the loan repayment date. (Edmonton Journal)

Sometimes, shares of stock offered by a company are not regular, market-driven common shares. Instead, they may be preferred shares, which are considered fixed income securities and are issued with a par value. When that par value is paid back to the purchaser of the preferred share, this is considered a redemption. (Investopedia)