Analysts and Abivax's CEO believe the upcoming maintenance trial for its drug Obafazimod has a very high probability of success. This confidence is based on the historical rarity of drugs succeeding in the initial 'induction' phase but then failing in the longer 'maintenance' phase for ulcerative colitis.

To raise capital, biotechs need specific clinical data. Raj Devraj specifies the three essential components investors look for: 1) confirmation of good drug exposure in humans, 2) a favorable early safety profile, and 3) biomarker data that provides proof of the drug's biological mechanism. Lacking any of these makes fundraising significantly harder.

By using the public number of patients enrolling in Abivax's maintenance trial (which only responders could join), an investor could mathematically model the pooled response rate and prove the trial would succeed before the official data release, representing profound public-domain alpha.

Unlike most trials that avoid patients who failed other therapies, Corvus intentionally included them, considering it a 'stacking deck against yourself'. This high-risk bet, based on their drug's unique mechanism, paid off by showing efficacy in a tough-to-treat population and demonstrating a lack of cross-resistance.

When a competitor (Beijing) presented similar positive data for its BTK degrader, the CEO of Neurix viewed it as a positive reinforcement for the entire drug class. In a novel field, parallel success from independent companies de-risks the underlying biological mechanism for investors, partners, and clinicians.

Crohn's disease is a higher bar for drug approval than ulcerative colitis, often due to fibrotic strictures. Abivax has presented preclinical data suggesting its drug has anti-fibrotic properties. This is a key differentiator, as therapies that fail in Crohn's often lack this effect, providing a mechanistic rationale for potential success.

Abivax's drug has a novel, not fully understood mechanism (miR-124). However, analysts believe strong clinical data across thousands of patients can trump this ambiguity for doctors and regulators, citing historical precedents like Revlimid for drugs that gained approval despite unclear biological pathways.

Analysts largely overlooked Abivax before its major data success because it was a European company with a recent US listing, its drug was repurposed from an initial indication in HIV, and investor attention in the IBD space was focused on other high-profile mechanisms like TL1A and S1Ps.

The acquisition of Verona shows that a novel mechanism of action with a substantial clinical effect can make a company a prime M&A target. This holds true even with weaknesses like no composition of matter patent or an unfashionable drug delivery method, especially in disease areas lacking innovation.