What happened Cannabis companies received a boost after Amazon (NASDAQ: AMZN) said it would support federal marijuana legalization efforts. Sundial Growers (NASDAQ: SNDL) and Tilray (NASDAQ: TLRY) rose 13% and 12%, respectively, on the news. So what Amazon executive Dave Clark said in a blog post that the e-commerce giant would support the Marijuana Opportunity Reinvestment and Expungement Act of 2021, or the MORE Act. This legislation seeks to decriminalize marijuana at the federal level and expunge cannabis-related criminal records. Amazon also called for other businesses to support the bill. "We hope that other employers will join us, and that policymakers will act swiftly to pass this law," Clark said. Image source: Getty Images. Additionally, Amazon will no longer screen its employees for marijuana use, except for when it's required to do so by the Department of Transportation. "In the past, like many employers, we've disqualified people from working at Amazon if they tested positive for marijuana use," Clark said. "However, given where state laws are moving across the U.S., we've changed course." Now what The news helped to drive the prices of many pot stocks higher on Wednesday. Investors are betting that cannabis reform could make it easier for marijuana producers to conduct business, as well as boost demand from recreational consumers. Tilray and Sundial Growers are among those that stand to benefit. Tilray recently completed its merger with Aphria, which made it one of the industry's largest companies by revenue. Sundial, meanwhile, has raised hundreds of millions of dollars via stock offerings, which it has begun to deploy in an array of cannabis-focused investments. 10 stocks we like better than Sundial Growers IncWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Sundial Growers Inc wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of May 11, 2021 John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool's board of directors. Joe Tenebruso owns shares of Amazon and has the following options: long January 2023 $2,400 calls on Amazon. The Motley Fool owns shares of and recommends Amazon. The Motley Fool recommends the following options: long January 2022 $1,920 calls on Amazon and short January 2022 $1,940 calls on Amazon. The Motley Fool has a disclosure policy.Source