Core Insights - Investors in US corporate bonds are experiencing significant earnings from interest payments, leading to a reinvestment surge that outpaces the supply of new bonds [1][2] - The demand for corporate bonds has resulted in a cash surplus of approximately $74 billion for reinvestment, exceeding the amount of bonds sold [2] - High coupon payments are expected to decline as the Federal Reserve lowers interest rates, but current earnings from coupons are projected to reach $465 billion this year and $517 billion next year, marking the highest levels since at least 2018 [4][5] Group 1 - Blue-chip companies have issued over $1 trillion in bonds through August, but money managers have received more in interest and principal payments, leading to increased reinvestment [1] - The credit derivatives market is being utilized by money managers to compensate for the lack of new bonds, gaining exposure to over $110 billion of debt through credit-default swaps [2][6] - The demand for corporate bonds has driven risk premiums in the secondary market to multi-decade lows, with spreads on US high-grade corporate bonds shrinking to 0.72 percentage points, the lowest since 1998 [6] Group 2 - The strategy of selling credit default protection on indexes has gained popularity, with selling positions on the main investment-grade index increasing by about 29% from a year ago [7] - Fund managers are cautious about taking risks relative to their benchmarks due to high valuations in the current market [3]