Tuesday finally gave investors the rally that they'd been looking for. After a gloomy September that's featured several significant pullbacks, market participants finally seemed to feel a bit more confident about the prospects for stocks surviving the often-challenging early fall season. Gains came across the board for major benchmarks, although as we've seen a lot lately, the Dow Jones Industrial Average (DJINDICES: ^DJI) lagged behind the S&P 500 (SNPINDEX: ^GSPC) and the Nasdaq Composite (NASDAQINDEX: ^IXIC). Index Percentage Change Point Change Dow Jones Industrials +0.52% +140 S&P 500 +1.05% +35 Nasdaq Composite +1.71% +185 Data source: Yahoo! Finance. Among noteworthy stocks, Amazon.com (NASDAQ: AMZN) made headlines with yet another bold move to try to muscle its way into a niche that a smaller company has already pioneered. Meanwhile, Aurora Cannabis (NYSE: ACB) had marijuana investors excited going into its quarterly earnings report after the bell, with many hoping that the long-suffering cannabis sector might finally bounce back. Breaking away Shares of Amazon rose almost 6%. Some of that gain was probably due more to the overall market rebound than company-specific news. However, what got the most attention was the e-commerce giant's announcement regarding connected fitness equipment, as it signaled a direct assault on bike and treadmill pioneer Peloton Interactive (NASDAQ: PTON). Peloton rival Echelon launched a connected stationary bike that will be sold exclusively on Amazon. The EX-Prime Smart Connect Bike, or the Prime Bike for short, seeks to offer a similar connected experience to Peloton's products at a lower cost. The Prime Bike will retail for $499, a fraction of what Peloton bikes cost. Echelon said that it developed the bike "in collaboration with Amazon," signaling a more active role from the tech titan than just giving Echelon a place to sell its equipment. Echelon intends to offer a lineup of interactive fitness classes that's similar to what Peloton subscribers get. What's missing is Peloton's connected screen, but Echelon says that people can connect their own mobile devices to the bike. Shares of Peloton largely held their own, moving lower by just a fraction of a percent. What's remains to be seen is whether Peloton will retain the cachet of a high-end premium brand while Echelon and Amazon end up duking it out with other low-priced equipment makers. Image source: Getty Images. Aurora stirs the pot Meanwhile, Aurora Cannabis shares gained 16% in the regular session, but they were extremely volatile in after-hours trading. The marijuana company released its fiscal fourth-quarter results, and in contrast to what some analysts on Wall Street had hoped, the numbers weren't entirely satisfying. Coming into the report, investors had hoped that the views of analysts at Jefferies would prove to be prescient. Jefferies had praised Aurora for making progress in cutting operating costs. Even though analysts remained concerned about the company having enough cash to cover needed investments, the stock price had already fallen enough to warrant that risk. Yet Aurora's results were still lackluster. Revenue for the quarter was down 5% from fiscal Q3, with a larger drop in consumer sales. Even though sales volumes of dried cannabis jumped 36%, declines in pricing power offset the higher volume. Increased production contributed to pressure on prices as well. Significant impairment charges also weighed on results, including a $1.6 billion writedown on goodwill and intangible assets. In response, the stock was down 9% in after-hours trading about 45 minutes after the release. That still left the share price higher than where it started the day, but Aurora has work to do before it will convince investors that the marijuana stock is in a sustainable recovery mode. Here's The Marijuana Stock You've Been Waiting ForA little-known Canadian company just unlocked what some experts think could be the key to profiting off the coming marijuana boom. And make no mistake – it is coming. Cannabis legalization is sweeping over North America – 11 states plus Washington, D.C., have all legalized recreational marijuana over the last few years, and full legalization came to Canada in October 2018. And one under-the-radar Canadian company is poised to explode from this coming marijuana revolution. Because a game-changing deal just went down between the Ontario government and this powerhouse company...and you need to hear this story today if you have even considered investing in pot stocks. Simply click here to get the full story now. Learn moreJohn Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. Dan Caplinger has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Amazon, Jefferies Financial Group Inc., and Peloton Interactive and recommends the following options: short January 2022 $1940 calls on Amazon and long January 2022 $1920 calls on Amazon. The Motley Fool has a disclosure policy.Source