To compute a maximum loss, the daily percent losses must be "compounded" by multiplying one (the initial premium) minus the reported daily loss for each day in the period of interest, and then subtract one from the final product to get the compound "gain," ie [(1+x) * (1+y) * (1+z)...]-1, where x,y,z...are the "gains" each day. Since no daily "gain" can be greater than -1, all values multiplied will be 0 or positive, so the product will be 0 or positive and after subtracting 1 it can be no worse than -100%. That would mean that on some particular day, every stock in the index in which you were invested was worth nothing (and you "sold" them anyway, essentially gave them away.) The likelihood of this happening, of course, is beyond the calculating capabilities of the Galactic Hitchhiker's Improbability Drive. But even theoretically you can't lose more than you've got, or 100%.
For illustration, suppose that for 5 days straight, you chose the worst performing fund which lost 20%. You will not have lost all your money (5 * 20% = 100%), but only 0.8*0.8*0.8*0.8*0.8 = 0.32768. So you would still have an impressive (after those kind of losses) balance of 33% of your starting principle.
Of course, gains are compounded like this as well, so I suspect that the max gain you have listed should be much, MUCH higher. Of course that is why it takes a 100% gain to "correct" a 50% loss.