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Discrepancy in Portfolio Weight Calculations – Rounding Inaccuracy in Platform

j
joseJuly 13, 25 | Posted in General

Hi there,

I’m using your annual plan ($190) and noticed recurring issues with percentage calculations in Portfolio Lab. When I input normalized weights that should total exactly 100%, the system reports results like 110.54% or 100.02%, which suggests a rounding or input logic inconsistency.

My portfolio was built with precision — all allocations are based on live values and adjusted to eliminate drift. Yet the platform still interprets them with a slight overage, which affects modeling accuracy for rebalancing and margin planning.

Can you clarify how Portfolio Lab processes these weights? I’d appreciate any insight into whether this can be corrected or if there’s a preferred input format to avoid the deviation.

Thanks, Jose

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DS
Hey, we haven’t seen rounding issues like the one you described. Could you reach out to support@portfolioslab.com with your portfolio details so we can take a closer look?
j
joseJuly 27, 25
Can you clarify how Portfolio Lab processes these weights? Thank you

There’s no special processing, they’re just summed up. I’d understand if there was a small rounding error and the total came out to something like 100.1 or 99.9, which isn’t uncommon due to different rounding techniques. But the numbers you posted are way too far off, so there might be something else at play. We’d be happy to take a look if you can share your portfolio with support.

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