Bank for International Settlements working paper finds higher passive index fund ownership raises syndicated loan spreads and bank monitoring intensity

The Bank for International Settlements published a working paper assessing how banks price syndicated loans when a borrower’s shareholder base shifts towards passive index funds. Using US public-firm data, the paper finds that greater passive ownership is associated with higher loan spreads, consistent with banks demanding more compensation when shareholder oversight weakens and with banks incurring higher monitoring costs. An event study around large increases in passive ownership of more than five percentage points shows loan spreads rising by about 6.5%, or roughly 12 basis points from a sample average of 175 basis points. Using Russell 1000 and Russell 2000 index reconstitutions as a quasi-exogenous source of variation, downgrades to the Russell 2000 increase passive ownership by about two percentage points and are associated with an approximately 13% rise in loan spreads, while upgrades reduce passive ownership and lower spreads. The spread effects are strongest for firms with stronger ex ante corporate governance indicators and higher institutional ownership; firm risk measures and collateral usage move in the expected direction after increases in passive ownership, but mediation tests suggest observable risk changes explain only a modest portion of the spread impact. On bank behaviour, the paper reports tighter financial covenant terms after increases in passive ownership, a higher incidence of loan-to-value covenants and field examinations in contract text, smaller syndicates, and higher retained shares by lead arrangers, consistent with more intensive bank monitoring. Changes in analyst coverage after reclassification do not account for the post-downgrade increase in loan spreads.