With shares down 10% year to date, Nvidia's (NASDAQ: NVDA) rocket ship rally has hit a roadblock, even as its chip business continues to break records. Fourth-quarter earnings were yet another slam-dunk success -- but instead of celebrating,

Gil Luria of DA Davidson highlighted increased competition from China and declining profit margins as concerns for Nvidia.

Nvidia (NASDAQ:NVDA) has set the bar so high that what would be considered absolutely fantastic earnings for most companies only elicits a