Empresas y finanzas
Wall Street falls on borrowing concerns
* SanDisk-Samsung agreement cuts Nasdaq losses
* The Dow Jones industrial average dropped 173.47 points, or 2.05 percent, to close unofficially at 8,300.02. The Standard & Poor's 500 Index dropped 17.27 points, or 1.90 percent, to 893.06. The Nasdaq Composite Index dropped 19.35 points, or 1.11 percent, to 1,731.08.
(Reporting by Rodrigo Campos)