Director McNair Darrell L's recent purchase of 3,000 shares increases his total holdings to 63,912 shares, signaling confidence in NYSE:AP.Despite a negative P/E ratio of -9.69, the price-to-sales ratio of 0.12 and enterprise value to sales ratio of 0.41 suggest the stock might be undervalued.The company's debt-to-equity ratio of 2.33 indicates high reliance on debt, yet a current ratio of 1.84 shows sufficient liquidity to meet short-term obligations.Ampco-Pittsburgh Corporation, trading on the NYSE under ...