What is the fine-grained topic of the following text: SMP and cheddar values both dropped by 2% to £1,410/t and £3,050/t, while this week’s Global Dairy Trade auction, an indicator of international dairy market sentiment, fell for the 11th consecutive fortnight, dropping by 2% to average $2,851/t (£2,191/t). Only return the topic.
International dairy market trends