Why did Nexans shares fall after its CEO change?

On this episode of Stock Movers:
- Fresnillo gained on gold and silver's record highs as HSBC analysts raised its recommendation to hold from reduce.
_ AstraZeneca rebound following a deal with the Trump administration to lower drug prices in the US in exchange for tariff relief.
- Nexans drops after the cable manufacturer announced a change in CEO, which JPMorgan says comes as a surprise.

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