By Amy Russo, includes “… Calling the proposal ‘a risky strategy with a mixed track record,’ Magaziner said that as of the writing of his letter, ‘the presentations made by the City’s Administration so far have not included either a clear accounting of the potential financial benefit of the proposal, nor a clear strategy for mitigating the risks associated with the proposal.’ ‘Once a pension obligation bond is issued there is no turning back,’ he warned. …”