Hexo Corp. appears to have been repeatedly making a mistake in its financial statements since June 2017, according to a MarketWatch analysis.

The Quebec-based cannabis company HEXO, +1.77% HEXO, +3.03% appears to have been incorrectly tabulating the remaining lifetime weighted average of its employee stock options. In financial statements analyzed by MarketWatch, the company appears to add up each stock option’s remaining life to arrive at the total weighted average of all the options outstanding in a given quarter.

“ Canadian weed stocks fell sharply in 2019, which led to most of them trading well below the exercise prices of stock options granted to employees prior to those stock-market declines. ”

That the company’s financial accounting has been adding up the amount of remaining time versus arriving at an average suggests that either the remaining life of the options or the figure given as the average value may be incorrect. Hexo is required to disclose the amount of stock reserved for options, including the correct terms and amounts, according to International Financial Reporting Standards.

The apparent issue first appeared in Hexo’s third-quarter interim financial statements in fiscal 2017 and continued through the company’s first-quarter results in fiscal 2020 — including two sets of audited financial statements — according to a MarketWatch analysis of Hexo filings. Over the past year, Hexo has employed three chief financial officers.

MarketWatch could not determine whether the apparent issue affected the company’s net income.

Three of the quarterly filings and one annual audited filing did not include the total weighted average of employee stock options’ lifetime. Hexo did not respond to requests for comment.

Read:Shorting cannabis stocks was a billion-dollar idea in 2019

Hexo recently restated its first-fiscal-quarter results in a filing with Canadian regulators on Dec. 31. The restatement corrected an error in how the company calculated its deferred tax liabilities and the value of its cannabis trim inventory, but the apparent options issue is present.

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Before the options-accounting issue appeared in June 2017, the company, which was then known as Hydropothecary Corp., changed auditors to MNP LLP from UHY McGovern, Hurley, Cunningham LLP, according to a June 2017 filing with Canadian regulators. An MNP LLP spokesman declined to comment, saying that the firm doesn’t discuss its work for clients.

Ed Chaplin served as Hexo CFO for about four years and resigned in May. The company appointed Stephen Burwash to serve as interim CFO until it tapped Michael Monahan for the position at the end of May. Monahan stepped down on Oct. 7 and was replaced by Burwash.

Canadian weed stocks fell sharply in 2019, which led to most of them trading well below the exercise prices of stock options granted to employees prior to those stock-market declines. In all but a few cases, the businesses would have to notch double or triple-digit percentage gains in order for the employee options to be in the money.

Taking into account the restated results for the first fiscal quarter, Hexo reported losses of C$60 million, which amounts to 23 cents a share, on net revenue of C$14.5 million. Shares of Hexo closed down 8.99% to $1.62 on Friday, as the ETFMG Alternative Harvest ETF rose 0.3% and the Horizons Marijuana Life Sciences Index ETF gained 0.9%.