Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Carnival (CCL) upgraded to Buy from Neutral at Goldman Sachs analyst Stephen Grambling citing the company accelerating its net unit growth from 2.5% in the last 3 years to 5% over the next 3 years and also believes that concerns about net yields in Europe are overblown. 2. Sanderson Farms (SAFM) upgraded to Neutral from Underweight at JPMorgan with analyst Ken Goldman saying he now views the stock's upside/downside risk as balanced. 3. Axis Capital (AXS) upgraded to Outperform from Market Perform at Keefe Bruyette with analyst Meyer Shields saying Axis is positioned for strong underwriting improvement. 4. Broadridge (BR) upgraded to Outperform from Market Perform at Raymond James with analyst Patrick O'Shaughnessy saying he believes Broadridge's current valuation offers investors an attractive entry point into a differentiated, high barrier to entry business. 5. Aurora Cannabis (ACB) upgraded to Buy from Hold at GMP Securities with analyst Martin Landry saying new high profile strategic advisor Nelson Peltz could be "instrumental" in facilitating partnership talks with large consumer packaged goods companies. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

Bullish option flow detected in Aurora Cannabis with 17,493 calls trading, 1.1x expected, and implied vol increasing over 8 points to 156.38%. 4/26 weekly 8 calls and 4/26 weekly 7.5 calls are the most active options, with total volume in those strikes near 9,200 contracts. The Put/Call Ratio is 0.09. Earnings are expected on May 9th.

In this week's "Rising High," The Fly's recurring series focused on cannabis and psychedelic stock news, The Fly looks back on study dosing, a completed acquisition and a research partnership. ATAI ANNOUNCES DOSING... To see the rest of the story go to thefly.com. See Story Here