CLSA Downgrades Halliburton Company To Underperform By: Benzinga via Benzinga April 20, 2015 at 08:40 AM EDT Analysts at CLSA downgraded Halliburton Company (NYSE: HAL) from Outperform to Underperform. Halliburton shares have dropped 25.48 ... Read More >> Related Stocks: Halliburton Co