Trade 1890 to 1860 B.C in one area

" The traders of Kanesh used financial tools that were remarkably similar to checks, bonds and joint-stock companies. They had something like venture-capital firms that created diversified portfolios of risky trades. And they even had structured financial products: People would buy outstanding debt, sell it to others and use it as collateral to finance new businesses. The 30 years for which we have records appear to have been a time of remarkable financial innovation." from The V.C.s of B.C.