Northern Trust is set to execute the largest mutual fund to ETF conversion in history, transferring $33 billion in assets. The move will instantly double the firm's ETF assets under management, marking a significant expansion of its exchange-traded product lineup. The conversion strategy allows asset managers to enter the competitive ETF market with established assets and performance track records already in place. This approach has gained popularity as firms seek to leverage existing fund histories to gain immediate scale and credibility in the rapidly growing ETF sector.