On Standard Chartered, Pre NVDA split, My unrealized P/L (%) was in the hundreds. Now after the split, it only shows a 5%.

I believe it's because after the split they left the original shares alone and then credited me a 9:1 difference.

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Is this a common way brokerages handle stock splits?

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While I do realize that my overall investment value is correct, it is a bit frustrating to see a skewed percentage.

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I hope I am being clear.