Is DZS, Inc. overvalued or undervalued?

As of 12 November 2019, the valuation grade for DZS, Inc. moved from expensive to risky, indicating a significant deterioration in its financial outlook. The company appears to be overvalued given its troubling metrics, including a P/E ratio of 0.00, an EV to EBITDA of -0.17, and a ROE of -292.77%.
In comparison to its peers, DZS, Inc. stands out negatively; for instance, PowerFleet, Inc. has a P/E of -29.42, while AudioCodes Ltd. boasts a fair valuation with a P/E of 21.41. The stark contrast in these ratios highlights DZS's precarious position within the telecom equipment industry. Additionally, DZS, Inc. has experienced a staggering YTD return of -99.99%, significantly underperforming the S&P 500's return of 12.22%, further reinforcing the notion that the stock is overvalued.