Week 44 Day 5: The Bond Tent: Extra Protection Around the Retirement Transition

Normal allocation: 70% stocks / 30% bonds throughout retirement. Bond tent: increase bonds to 50% at retirement age. Over the next 10-15 years, gradually shift back to 70/30. Why? The first 5-10 years of retirement are when a market crash would hurt the most (sequence risk). Extra bonds during this window cushion the blow. After year 10, sequence risk diminishes and you shift back to stocks for growth.

The bond tent mechanics: Age 55 (10 years before retirement): 80/20 stocks/bonds. Age 60 (5 years before retirement): 70/30. Age 65 (retirement start): 50/50 (peak bond allocation). Age 70: 55/45. Age 75: 60/40. Age 80: 65/35. Age 85: 70/30 (back to growth allocation). Why it works: (1) Sequence risk is highest at the start of retirement. A 30% crash at age 65 with a 70/30 portfolio causes a 21% portfolio decline. With a 50/50 portfolio: 15% decline. In dollar terms on $1M: $210,000 loss vs. $150,000 loss. The $60,000 difference, compounded over 25 years, becomes $100,000-$200,000 in additional terminal wealth. (2) After 10-15 years, the portfolio has either (a) grown significantly (good sequence, return to stocks is fine) or (b) survived a bad sequence (the bond tent protected it). Either way, the high-sequence-risk period is over. (3) Increasing stock allocation as you age (the 'rising equity glide path') IMPROVES long-term portfolio sustainability because it recovers from early-retirement losses with higher stock growth. Kitces (2014) showed that a rising equity glide path (from 30% stocks at retirement to 70% stocks at age 90) outperformed BOTH the static 60/40 allocation AND the decreasing equity glide path (from 70% stocks at retirement to 30% at 90) in terms of safety and terminal wealth. (4) Implementing the bond tent: set a calendar schedule (e.g., increase stock allocation by 2% per year starting 5 years into retirement). Rebalance annually. No market timing required.

The bond tent (or 'rising equity glide path') was formalized by Kitces and Pfau (2014) in their paper 'Reducing Retirement Risk with a Rising Equity Glide Path.' They tested three strategies over all historical 30-year retirement periods: (1) Static allocation (60/40 throughout), (2) Declining equity glide path (70% stocks at retirement, declining to 30% by age 90), and (3) Rising equity glide path (30% stocks at retirement, rising to 70% by age 90). The rising glide path dominated: it had the highest safe withdrawal rate (approximately 4.5% vs. 4.0% for declining) and the highest median terminal wealth. The intuition: early retirement is when the portfolio is largest and most vulnerable to sequence risk. Protecting it with bonds during this period (low equity allocation) minimizes the probability of a catastrophic loss. After 10-15 years, the portfolio has either survived or thrived, and increasing equity allocation captures the long-term equity premium. The rising glide path also aligns with the spending smile: early retirement spending is high (funded by bonds and cash flow), while late retirement spending is lower (funded by equity growth). The bond tent is the practical implementation of this theoretical insight: peak bond allocation at retirement, gradually declining over the subsequent 15-20 years. The magnitude of the benefit depends on the specific market conditions encountered: in benign sequences, the bond tent slightly underperforms a static stock-heavy allocation (opportunity cost of holding more bonds). In adverse sequences (the ones that create retirement failure), the bond tent provides substantial protection. Since the purpose of retirement planning is to avoid failure (not to maximize terminal wealth in the best case), the bond tent is a rational insurance strategy.