All perfect praise be to Allah the Lord of the Worlds. May His peace and blessings be upon our Prophet Mohammad and upon all his family and companions.
From the perspective of Sharia, it isn`t permissible to replace the Fund`s losses with the interests, because this is benefitting from usury, which is forbidden. Allah the Almighty Says {What means}: "Those who devour usury will not stand except as stand one whom the Evil one by his touch Hath driven to madness. That is because they say: "Trade is like usury," but God hath permitted trade and forbidden usury." {Al-Baqarah, 275}.
All participants must get rid of these interests by giving them to charities, because it isn`t permissible to benefit from any portion of them. Allah the Almighty Says {What means}: "If ye do it not, Take notice of war from God and His Apostle: But if ye turn back, ye shall have your capital sums: Deal not unjustly, and ye shall not be dealt with unjustly." {Al-Baqarah, 279}. And Allah the Almighty Knows Best.