Thanks for confirming that. I assumed that the downturn was supposed to be part of the shape too, by analogy with earlier(?) terms like "V-shaped recovery", but I guess not.

If I can suggest an alternative, what about "Y-shape" where you tilt your head a little bit so that the bottom of the Y points slightly to the right? (Edit: after googling this it seems I'm not the first to propose this.)

Unicode to the rescue: 𝈄 or ≺