Piotroski F-score is a number between 0 and 9 which is used to assess strength of company's financial position. The score is used by financial investors in order to find the best value stocks (nine being the best). The score is named after Stanford accounting professor Joseph Piotroski. [1]
The score is calculated based on 9 criteria divided into 3 groups. [2]
Some adjustments that were done in calculation of the required financial ratios are discussed in the original paper. [2]
The score is calculated based on the data from financial statement of a company. A company gets 1 point for each met criterion. Summing up of all achieved points gives Piotroski F-score (number between 0 and 9).
The highest possible Piotroski score is 9 and the lowest is 0. Higher the score better the value of the company's stock. F-score of 8–9 is considered to be strong. Alternatively, firms achieving the F-score of 0–2 are considered to be weak.
Average value of Piotroski F-score can be different in different branches of economy (e.g. manufacturing, finance, etc.). This should be taken into consideration when comparing companies with different specializations.
The Piotroski F-score is a method invented or thought up a few decades ago. Since realities are no longer what they were when it was conceived, it can happen that this strategy, although effective, suffers from some shortcomings. First, it is a strategy that only compares a company's results in one year to those of the previous year. This makes it difficult to apply in cyclical sectors or during particular periods such as during health crises that affect the profitability of all sectors (e.g. the Covid-19 pandemic in 2020).
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