what is the difference between the altman z score and the piotroski score 
the piotroski score assesses financial strength while the altman z score assesses the likelihood of bankruptcy both determine their outcomes by assessing the financial information of a company the bottom linethe piotroski score helps determine good value stocks by assessing the overall financial strength of a company it looks at a variety of metrics from net income to profitability to liquidity to cash flow to margin to debt and more the score can help investors pick stocks or sell off ones that may no longer be a good value 