Contours of Transfer Pricing CUP The Precision Method II of VII

The CUP method benchmarks controlled transactions against prices observed in comparable uncontrolled transactions.

It is widely regarded as the most reliable transfer pricing method due to its direct reliance on market prices rather than derived financial indicators. 

However, this reliability is conditional upon a high degree of comparability, often to the level of near identity.

The method is most effective in cases involving standardized products, financial instruments, or transactions with observable market pricing. 

Its application is significantly strengthened where internal comparables exist. 

That said, practical challenges such as data limitations, market volatility, and the presence of intangibles often restrict its usability, particularly in complex or unique business models.