(Bloomberg) -- American International Group's assurances of underwriting progress are drawing increased skepticism from Wall Street analysts after another disappointing quarter.

Results from international commercial coverage and the American consumer business were short of estimates, "and this isn't the first time those two areas have shown difficulty," Michael Nannizzi of Goldman Sachs said Thursday on New York-based AIG's conference call discussing third-quarter results. "What are you doing to get there, and how long is it going to take?"

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