Oklo is up 533% on the year, and almost 90% in September -- is it a strong buy?It's not every year that a nuclear start-up surges 500% year to date and still gets less chatter than the latest artificial intelligence (AI) start-up.And yet here we are with advanced nuclear company Oklo (OKLO -9.13%).The stock has gone from relative obscurity to a $19 billion market valuation in under a year, outpacing not only rivals like NuScale (SMR -5.22%), but also Wall Street favorites like Nvidia and Palantir.Yet unlike ...