Last brain bender of the week....

Whoohoo! Friday! And here is today's puzzle....

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An interesting idea is written below in a simple substitution code.

XIBU HPFT VQ DPNFT EPXO FYDFQU QSJDFT

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Answer to be found later in the comments....

Update: Today's winner is Blue Tige! Who coded his own respone to the phrase: What goes up comes down except prices. Happy Friday!