Spot on.
It's also pretty interesting that the China - Soviet Union proposed compromise is that NK should stop its Nuclear weapons program and stop firing ICBM's, and in return the US should stop parading it's armed forces all around the peninsular. As I understand it, NK accepted. The US however said no thanks.
In that context, it's perhaps not surprising NK are continuing with their weapons program. They are basically shit scared they will at some point be invaded and the regime overthrown, and it would seem they have good reason to feel like that.
I might also add, it is inconceivable even for someone as potty as the Donald to launch a first strike. He'd either have to kill millions in NK in the first salvo (in which case, he'd almost certainly be tried for war crimes and go to prison, which I suspect he doesn't fancy much), or he'd leave NK able to retaliate and doubtless kill millions in South Korea, not to mention the 50,000 US troops there. Not exactly a vote winner, even if he did have no conscience and could live with the consequences of the huge loss of life he'd caused. Also not to mention the worldwide economic meltdown, all on his watch.
So Trump is powerless to strike first. And NK never would, since it would ensure their complete and immediate and total annihilation.
It's basically a total stalemate that's going nowhere, and the markets are similarly not that bothered about it.