In the local Turkish steel plate spot market, traders' prices for stock material St37 grade 15-40 mm x 1,500 mm steel plate in Turkey's Gebze region have decreased by $15/mt during the past two weeks to $475-495/mt ex-warehouse, while prices for the same grade in Eregli region have decreased by $15/mt in the same period to $460-485/mt ex-warehouse. Both for advance payments and excluding 18 percent VAT, for October deliveries.