But many others are backed by everything from loans to developers to accounts receivable to valuables such as gold and jewels.

WSJ: China Tightens Regulations on Wealth Management

Asset-based lenders extend loans that are backed by marketable securities, equipment, inventory, accounts receivable and other business assets.

WSJ: How to Finance Your Start-Up Without Tapping Home Equity

For commercial loans, companies that are not bank eligible often turn to asset-backed lenders, pledging inventories and accounts receivable or leasing equipment rather than purchasing it.

FORBES: Credit Availability Forecast: 2012-2014