The above circuit was simulated using Multisim-Live. A rough see through tells me that the op-amp is in positive feedback as the output of op-amp is at base and inverting terminal to the collector, which is inverted wrt the base. But the simulation doesn't show output of op-amp to saturate, i.e., +- 15V (check the probe values). Note that the op-amp is not a particular model. It's just named "5T_VIRTUAL".A similar question was asked here and my understanding holds as much as I see. I have been scratching my head all morning and I don't understand why the simulation is showing such results.
