Percentages of gain/loss are incorrect. They were 10 times the actual number
percentages for gain/loss were incorrect. They were ten times higher than they should have been
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Marcin Blecharz commented
The day/total numeric values are correctly summed from all the portfolios listed.
However the percentage values for those are totally out of place - as Philip mentioned way above.
What is funny though is that the same percentage values for individual portfolios are calculated correctly - maybe just double-check on what is being summed/counted up? It seems you have the proper values ready but for some reason (bug?) you use wrong ones.
incorrect data (the sum for all the portfolios)
day gain +195.74 (+44.72%)
total gain +3,270.46 (+803.63%)
correct data (for individual portfolios)
day gain +46.76 (+0.28%)
total gain -41.20 (-0.25%)
day gain +148.98 (+0.55%)
total gain +3,311.66 (+13.70%)
You can actually check on my own data since I've it uploaded on this account on finance.yahoo.com - the My Portfolio section.