Incorrect historical prices

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1

Is there an explanation for discrepancies in P123 historical prices?

Two examples I discovered by chance, but there could be more:

  • CTRA on January 30th 2023: P123 closing price: $22.81; real closing price: $24.66
  • ALB on February 27th 2023: P123 closing price: $250.91; real closing price: $257.02

Obviously, this is affecting the accuracy of the backtests.

2

Maybe you are looking at prices adjusted for dividends and splits?

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3

Thanks for the hint! This is indeed the case.