Though the outcome is a bit worse than I think most predicted, this has been telegraphed since about November of last year. Tableau has had a very high short interest ratio for sometime, everyone was expecting poor results. What really exacerbated their issue was that they didn't get out in front of this and let people know how bad they were going to miss. So when they released earnings everything went to shit on the…
Maybe the people buying yesterday didn't expect poor results. Or at least they expected the kind of poor results that would make the stock go up. Definitely it did come out "a bit worse" that they predicted.