Is electroCore, Inc. overvalued or undervalued?

As of 14 May 2019, the valuation grade for electroCore, Inc. moved from does not qualify to risky, indicating a shift towards a more cautious outlook. The company appears to be overvalued, given its high Price to Book Value of 9.74 and negative EV to EBIT and EV to EBITDA ratios of -2.87 and -3.20, respectively. Additionally, the Return on Equity (ROE) is significantly negative at -280.30%, further supporting the overvaluation assessment.
In comparison to its peers, electroCore's P/E ratio is not applicable due to its loss-making status, while Delcath Systems, Inc. is considered expensive with a P/E of 68.06, and Neuronetics, Inc. has a risky valuation with an EV to EBITDA of -7.61. The stock has underperformed notably against the S&P 500, with a year-to-date return of -69.19% compared to the index's 12.22%, highlighting the challenges the company faces in the current market environment.