Broadcom (BRCM) is advancing and Intel (INTC) is declining after Citigroup was upbeat about the former company and downbeat about the latter one in a note to investors earlier today. Citigroup analyst Glen Yeung raised his fourth quarter revenue estimate on Broadcom, and he expects the company to increase its guidance at its Analyst Day on December 6. The company is benefiting from greater availability of Apple's (AAPL) iPhone 5, and strong sales of Samsung devices, explained Yeung. Furthermore, Cisco's (CSCO) outlook earlier this month was "somewhat optimistic," said Yeung, who views Broadcom's fourth quarter guidance as conservative. The analyst maintained a Buy rating on the stock. Conversely, Yeung reduced his price target on Intel to $21 from $23, and believes that the company is likely to report lower than expected fourth quarter results. Data indicates that computer notebook sales have been weak this quarter, explained the analyst, who maintained a Neutral rating on the shares. In early trading, Broadcom gained 0.65% to $32.37 and Intel fell 1.62% to $19.76.