Investing in stocks based on valuation metrics is considered a smart strategy. The price-to-earnings (P/E) ratio is often the go-to metric due to its simplicity and ease of use. However, the price-to-sales (P/S) ratio is more useful for evaluating stocks of companies that are unprofitable or in early growth stages, as it helps assess value when earnings are minimal or non-existent.What is the Price-to-Sales Ratio?While a loss-making company with a negative price-to-earnings ratio falls out of investor favor ...