Beximco's Sukuk bond IPO subscription for 7.5 billion Taka received bids worth only 0.6 billion Taka. Investors simply aren't interested in Beximco's bond. What is a bond? Why would a well-known organization like Beximco try to sell bonds instead of selling more shares? Why would an organization like Beximco want to issue bonds instead of taking a bank loan?

Note: Please answer using concepts of finance. A sincere answer would be rated positive.