Rates inched lower Thursday in volatile trading. Mortgage-backed securities were little changed in early trading, but improved as stocks fell sharply. In economic news, weekly Jobless Claims declined to 315,000, well below the consensus forecast of 330,000. Retail Sales rose 0.3% in February, beating expectations, but January figures were revised significantly lower. Import Prices jumped 0.9%. An increase of 0.5% had been expected. No other key data will be released today.