In 'What to Watch on Wall Street' for Tuesday January 26, there are a number of companies reporting their latest financial results. Before the opening bell investors will hear from Procter & Gamble (PG), Lockheed Martin (LMT), and Johnson & Johnson (JNJ). Then after the market close, Apple (AAPL) and AT&T (T) will release their quarterly numbers. But the one investors are intensely eyeing is Apple. When the tech giant releases its first quarter fiscal 2016 earnings results, analysts are expecting the company to earn $3.23 a share on revenue of $76.61 billion. Compared to last year's first quarter results when the company earned $3.06 a share on revenue of $74.6 billion, the latest results are projected be higher. Since the company's previous financial report, shares have dropped 11 percent on concerns over slowing iPhone sales. On top of this, traders will want to see how much of an impact China's economic slowdown will have on the top line. TheStreet's U-Jin Lee reports from Wall Street.