Raising capital is difficult under normal conditions, and a tight credit market and fears of an economic slowdown have made the challenge harder. Unproven early-stage companies could face a tough time finding funds from informal investors who are less willing to take risks in an unsteady economy. Firms looking for equity investments should expect to give up more ownership for less cash than during flusher times. For established businesses that are good credit risks, lower interest rates will make borrowing more attractive. Here's what you need to know.