（这题也收纳在了经典题中）
Later, Adams and junior portfolio manager Frank Neeson review the fixed-income portfolios of two new defined benefit plan clients, Lawson Doors & Cabinets, Inc., and Wharton Farms. Lawson’s plan has 30 participants, who are mostly experienced craftsmen and machinists, whereas Wharton has over 100 participants in its plan. The average participant age is 15 years younger for the Wharton plan compared with the Lawson plan. In both plans, participants receive a monthly benefit upon retirement based on average final pay and have no option for a lump sum distribution.
Q. Which of the following three strategies is least likely appropriate for the plans in Exhibit 2?
- Duration matching
- Cash flow matching
- Contingent immunization
