Calculate the price-to-book (P/B) ratio for Company KKK, which has a book value of equity of $1,500,000 and a market capitalization of $2,000,000. Explain the price-to-book (P/B) ratio as a valuation metric used to assess a company's market value relative to its book value of equity per share. Discuss the significance of the P/B ratio in equity valuation, investor sentiment, and its implications for investment decisions and market trends.