Ru­mors of bad news can flick­er around the BioTwit­ter world in a heart­beat. And the im­pact can be dev­as­tat­ing.

On Tues­day the tar­get was In­tra-Cel­lu­lar Ther­a­pies $IT­CI, and the ru­mor was pegged to an up­date on the FDA’s web­page that not­ed the agency was can­cel­ing the Psy­chophar­ma­co­log­ic Drugs Ad­vi­so­ry Com­mit­tee meet­ing for Ju­ly 31 and the re­view planned for the biotech’s schiz­o­phre­nia drug, lu­mate­per­one to­sy­late cap­sules.

For the le­gions of in­vestors look­ing for some­thing, any­thing, on the in­ter­net to bet on with what might be an in­side clue to a cat­a­lyst, it was pure gold. Had reg­u­la­tors al­ready de­cid­ed against the drug? What could it mean? It had to be bad, right?

Dis­as­ter!

The com­pa­ny’s stock was shred­ded, drop­ping more than 30% on the spec­u­la­tion. More than $150 mil­lion in mar­ket cap was gone in a snap as word of the move spread.

Then, af­ter the mar­ket closed, In­tra-Cel­lu­lar tried to staunch the flow of red. The biotech put out a state­ment say­ing that they had sup­plied ad­di­tion­al in­for­ma­tion on their drug that the agency want­ed ex­tra time to study — hence the de­ci­sion to strike the ad­comm.

The FDA can­celled the Ad­vi­so­ry Com­mit­tee meet­ing to al­low suf­fi­cient time to re­view this new and any forth­com­ing in­for­ma­tion as they con­tin­ue the NDA re­view.  This in­for­ma­tion may re­sult in an ex­ten­sion of the Sep­tem­ber 27, 2019 Pre­scrip­tion Drug User Fee Act (PDU­FA) tar­get ac­tion date for the lu­mate­per­one NDA.

That was good for a 9% re­bound af­ter the bell on Tues­day.

Novartis $NVS may have given up, but Amgen $AMGN and Allergan $AGN are plowing ahead with their knockoff of Roche’s blockbuster biologic Rituxan in the United States.

Their copycat, ABP 798, was found to have a clinically equivalent impact as Rituxan — meeting the main goal of the study involving CD20-positive B-cell non-Hodgkin’s lymphoma patients. This is the second trial supporting the profile of the biosimilar. In January, it came through with positive PK results in patients with rheumatoid arthritis.

→ BeiGene $BGNE is getting a boost in its drive to field a rival to Imbruvica. The FDA has offered an accelerated review to zanubrutinib, a BTK inhibitor that has posted positive results for mantle cell lymphoma. The PDUFA date lands on February 27, 2020. The drug scored breakthrough status at the beginning of the year.

→ BeiGene isn’t the only biopharma company to gain special regulatory status today. Mustang Bio $MBIO and St. Jude Children’s Research Hospital announced that MB-107, a lentiviral gene therapy for the treatment of X-linked severe combined immunodeficiency, also known as bubble boy disease, has been granted Regenerative Medicine Advanced Therapy status.

The Trump administration is not giving up just yet. On Wednesday, the HHS filed an appeal against a judge’s decision in July to overturn a ruling obligating drug manufacturers to disclose the list price of their therapies in television adverts — hours before it was stipulated to go into effect.

In May, the HHS published a final ruling requiring drugmakers to divulge the wholesale acquisition cost— of a 30-day supply of the drug — in tv ads in a bid to enhance price transparency in the United States. The pharmaceutical industry has vehemently opposed the rule, asserting that list prices are not what a typical patient in the United States pays for treatment — that number is typically determined by the type of (or lack thereof) insurance coverage, deductibles and out-of-pocket costs. Although there is truth to that claim, the move was considered symbolic in the Trump administration’s healthcare agenda to hold drugmakers accountable in a climate where skyrocketing drug prices have incensed Americans on both sides of the aisle.

During BIO this year, I had a chance to moderate a panel among some of the top tech experts in biopharma on their real-world use of artificial intelligence in R&D. There’s been a lot said about the potential of AI, but I wanted to explore more about what some of the larger players are actually doing with this technology today, and how they see it advancing in the future. It was a fascinating exchange, which you can see here. The transcript has been edited for brevity and clarity. — John Carroll