The Week In Cannabis: Stocks Back In The Red, CannTrust Enters Creditor Protection, Good News For MedMen, GW Pharma After two strong weeks, marijuana stocks went negative again, with all major ETFs posting significant losses. Over the last five trading days: The ETFMG Alternative Harvest ETF (NYSE: MJ ) lost 13.85%. The AdvisorShares Pure Cannabis ETF (NYSE: YOLO ) tumbled 11.58%. The Cannabis ETF (NYSE: THCX ) took a 16.49% dive. The Amplify Seymour Cannabis ETF (NYSE: CNBS ) shed 10.99% of its value.The SPDR SP 500 ETF Trust (NYSE: SPY ) closed the period down 2.05%. The big news item of the week, beyond the COVID-19 pandemic, was CannTrust Holdings Inc. (NYSE: CTST ) (TSE: TRST) entering creditor protection under the CCAA and its stock being delisted from the the Toronto and New York Stock exchanges. The news was "a foregone conclusion," said Matt Markiewicz, managing director of Innovation Shares, which is behind the Cannabis ETF. "It is a stark reminder of how this industry and its actors are beholden to higher standards than most consumer product categories," he said. "There should be no gray area when compliance is involved and CannTrust, along with its investors, have now paid a heavy price for violating Health Canada's rules." Check out our cannabis, hemp and psychedelics news, now in Spanish on El Planteo .