Bond investors have ridden a profitable playbook this year to score big wins on Federal Reserve interest-rate cuts and tumbling short-term US yields. Now, they’re ready to look out a little longer on the Treasury curve. Most Read from Bloomberg A cluster of bullish option trades has emerged over the past two weeks, wagering that a rally in 10-year US Treasuries will drive the benchmark below 4% for the first time since April. Pacific Investment Management Co. is advising clients to lock in yields whi ...