The market extended its losing streak to four days on Wednesday but this time it was the Dow (INDEXDJX:.DJI) rather than the Nasdaq (INDEXNASDAQ:.IXIC) that led the decline. The blue chip index fell 0.95% while its tech-heavy counterpart lost 0.43%. The catalyst for today's losses were two early earnings reports that don't bode well for the rest of this season.   Alcoa (NYSE:AA) posted a 4.6% loss on the day after the aluminum producer cut its production forecast based on slowing demand especially in China. The company actually topped the Street's estimates but the warning spooked investors who unloaded ...