Goldman Sachs analyst Noah Poponak downgraded Booz Allen Hamilton Holding Corporation BAH from Neutral to Sell, lowering the price forecast from $108 to$94.Poponak notes that revenue and earnings growth may remain limited over the medium term, with valuation still facing downside risk.Medium-term revenue growth is now expected to be closer to flat, due to pressure on federal civilian spending and shifting priorities within the U.S. Department of Defense. Margins may also be at risk as contract structures e ...