Is Green Plains, Inc. overvalued or undervalued?

As of 8 May 2019, the valuation grade for Green Plains, Inc. has moved from very attractive to risky, indicating a significant deterioration in its investment appeal. The company is currently overvalued, as evidenced by its Price to Book Value of 0.39, an EV to EBITDA ratio of 22.56, and an EV to Sales ratio of 0.32, which suggest that the stock is priced higher relative to its earnings potential and sales compared to its peers.
In comparison to its peers, Green Plains, Inc. has a notably higher EV to EBITDA ratio than Tronox Holdings Plc, which stands at 10.3726, highlighting its relative overvaluation. Additionally, Green Plains' negative P/E ratio and ROE of -9.22% further underscore its financial struggles. Over the past year, Green Plains has underperformed the S&P 500, with a return of -23.40% compared to the index's 17.14%, reinforcing the notion that the stock is not a favorable investment at this time.