At December 31, 2019, the carrying amount and the intrinsic value of the outstanding liability related to the DSU plan was $3,876 (December 31, 2018 - $4,288) (note 19). The following table outlines information related to DSUs granted, expenses recognized and payments made during the year.

		Year ended
		Dec. 31, 2019		Dec. 31, 2018
Granted during the year:
Number of units		337,999		158,886
Weighted average price (C$/unit)	$	5.89	$	7.91
Expenses (gain) recognized during the year¹ (notes 6c)	$	1,157	$	(1,877)
Payments made during the year (note 19)	$	1,668	$	-

¹This expense relates to the grant of DSUs, as well as mark-to-market adjustments, and is presented within selling and administrative expenses on the consolidated income statements.

RSUs granted under the LTEP Plan may be settled in the form of Hudbay common shares or, at the option of Hudbay, the cash equivalent based on the market price of the common shares as of the vesting date. RSUs may also be granted under Hudbay's Share Unit Plan, however; the RSUs granted under the Share Unit Plan may only be settled in cash. Hudbay has historically settled all RSUs in cash. The Company has determined that the appropriate accounting treatment is to classify the RSUs as cash settled transactions.

At December 31, 2019, the carrying amount of the outstanding liability related to the RSU plan was $5,477 (December 31, 2018 - $12,201) (note 19). The following table outlines information related to RSUs granted, expenses recognized and payments made in the year.

		Year ended
		Dec. 31, 2019			Dec. 31, 2018
Number of units, beginning of year		3,666,867			3,405,713
Number of units granted during the year		1,080,741			1,031,701
Credits for dividends		7,554			9,724
Number of units forfeited during the year		(573,914	)		(21,190)
Number of units vested		(1,957,249	)		(759,081)
Number of units, end of year¹		2,223,999			3,666,867
Weighted average price - granted (C$/unit)	$	8.98		$	10.33
Expenses (gain) recognized during the year² (note 6c)	$	1,557		$	(496)
Payments made during the year (note 19)	$	9,380		$	6,435

¹ Includes 616,397 and 1,842,837 units that have vested; however, are unreleased and unpaid as of December 31, 2019 and December 31, 2018, respectively.

²This net expense reflects recognition of RSU expense over the service period, as well as mark-to-market adjustments, and is presented mainly within cost of sales and selling and administrative expenses. Certain amounts related to the Arizona segment are capitalized.

The Group's stock option plan was approved in June 2005 and amended in May 2008 (the "Plan").

Under the amended Plan, the Group may grant to employees, officers, directors or consultants of the Group or its affiliates options to purchase up to a maximum of 13 million common shares of the Group. As of December 31, 2018, all options had either been exercised, or expired.

No options were granted under the Plan during the years ended December 31, 2019 and December 31, 2018.

The Group estimates expected life of options and expected volatility based on historical data, which may differ from actual outcomes.

	Year ended			Year ended
	Dec. 31, 2019			Dec. 31, 2018
	Number of shares subject to option		Weighted-average exercise price C$	Number of shares subject to option			Weighted average exercise price C$
Balance, beginning of year	-	$	-	523,352		$	15.86
Forfeited	-	$	-	-		$	-
Expired	-	$	-	(523,352)	$	15.86
Balance, end of year	-	$	-	-		$	-