Building an artificial intelligence (AI) portfolio means looking beyond the obvious megacap names.Artificial intelligence (AI) isn't a passing trend -- it's the defining technological shift of our era. The companies building AI applications and industry-specific solutions today will likely dominate their markets for decades.While megacaps like Nvidia and Microsoft receive most of the attention, the shrewdest move may be owning a diversified basket of smaller, focused AI players with more room to grow. After ...