No, it would be undervalued because the company is expected to grow more relative to it’s P/E valuation when compared to its peers. This means the P/E is lower when taking growth into account, and the company is undervalued. If the company has a PEg of 4 then the growth would either be lower or the P/E would be higher than the peers and the market would be giving the company more credit for its expected growth than its peers have, making it overvalued from a relative perspective.