Yancoal - a new "A"/H premium?

Updated
Yancoal YAL is the largest pure-play coal miner in Australia. They have a secondary listing in Hong Kong 3668.

The shares rank equally and pay largely the same net dividends (2021 Australian dividend was fully non-franked). So, they ought to trade at the same price.

Today, 3668 is trading at close to 10% discount.
Note
Prices came back in line today. This reinforces the theory that we had a genuine arb. A stock to watch in the future.
arbitrageChart PatternsCoaldual_listing

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