With the possibility of escalating violence in Iraq, stocks in the defense sector could garner more attention next week. The stock market and oil prices were rattled late in the week after violence in the nation escalated as a Sunni insurgency against the government heats up. Even with tensions in the region mounting, the PHLX defense sector (.DFX) was down about 1 percent for the week, retreating with the broader S&P 500 (.SPX) after both indexes had closed at record highs on Monday.