One of the most valuable companies in the world, NVIDIA Corporation (NASDAQ:NVDA) could serve as a leading market indicator for the technology and semiconductor sectors when it reports second-quarter financial results on Wednesday, Aug. 28 after market close. Earnings Estimates: Analysts expect Nvidia to report second-quarter revenue of $28.68 billion, according to data from Benzinga Pro. The company reported revenue of $13.5 billion in last year’s second quarter. Nvidia has beaten revenue estimates from analysts in seven straight quarters and nine of the past 10 quarters. Analysts expect the …