Well, if you don't follow spaceflight / LVs it sure doesn't make much sense. From my PoV (very casual fan of the above) it actually is pretty spot on to value ULA at 1/10th value of SpaceX.

However reasons for that are too long to go into in one comment ... Mainly origin of & current owner structure of ULA, their current LVs cost & future and dynamics of SX launch business.