The sharp decline in semiconductor stocks is a cause for concern for technology investors. After trading day close on April 22, 2013, NXP Semiconductors (NXPI), Texas Instruments (TXN), Veeco Instruments (VECO), and STMicroelectronics (STM) are scheduled to report quarterly earnings. Compared to their 50-day moving average, shares are down anywhere from -2.01% to -14.89%: In the last year, all of the above companies are up with the exception of NXP Semiconductor, which declined 2.17%:In March 2013, when Samsung announced its Galaxy S IV, the company revealed that the NFC chip would be powered by Broadcom (BRCM) instead of that made by NXP Semiconductor (NXPI). Broadcom’s chip will work with STMicro (STM) in the Galaxy S IV for the near-field communications functionality. More recently, NXP and STMicroelectronics dropped when Cirrus Logic(CRUS) issued a warning. Recently, NXP Semi said that it sold 125 million NFC chips in 2012. Share trading action was negative. Private-equity investors sold 25 million shares in the company through a share offering. In February, 30 million shares were sold. Analysts at Raymond James downgraded Texas Instruments Inc. (TXN) ahead of its quarterly report, to a “market perform.” On a relative basis, Texas Instruments shares are holding up well, down the least from its 50-day moving average. The company previously forecast Q1 earnings would be between $0.28 to $0.32 per share on revenue of $2.8 billion – $2.91 billion. Although Veeco Instruments Inc. (VECO) is an LED manufacturer, the company would be of interest to investors concerned with price fluctuations for single-wafer MOCVD LED systems. Overcapacity in this segment threatens Veeco Instruments. Late last month, analysts at Canaccord Genuity set a target price of $48 for Veeco. Investors should expect volatility ahead of quarterly results.