Wikifolio – Yet another fuckup – They cannot even a school math

Just had a look at one of my Wikifolios: the overall performance is positive but the annualized one is negative. Sorry guys (and gals): it is impossible, since the total performance is calculated according to (1+r)^t, where r is the annual[ized] return, an t is the [fractional] number of years (and the latter is obviously positive). Even if you use the formula of continuous rate \exp{(rt)} (which you definitely do not understand since it is slightly beyond the school math), it still cannot be so that r is negative but the overall performance is positive.
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