Shares of Intel Corp. INTC, +1.58% are up 3.1% in Friday morning trading after Chief Financial Officer Bob Swan addressed concerns over the company's supply constraints. "The surprising return to PC TAM growth has put pressure on our factory network," he said in an open letter. The company is prioritizing the Intel Xeon and Core processors to focus on high-performance segments, but Swan said that "supply is undoubtedly tight, especially at the entry level of the PC market." The company expects that it will still have "at least the supply" needed to meet its full-year revenue forecast, which was announced in July. Intel is investing $15 billion in capital expenditures this year, up about $1 billion from the start of the year. "This capital along with other efficiencies is increasing our supply to respond to your increased demand," Swan said. Shares of Advanced Micro Devices Inc. AMD, +2.94% are down 3.3% in midday trading Friday. Intel shares are up 24% over the past 12 months, while the Dow Jones Industrial Average DJIA, +1.33% has gained 18%.