Answer:
b. Borrow another 3 billion dollars from brokers and use this additional money to trade on the same trading strategy.
Step-by-step explanation:
There is 40% return on the equity investment which means if $1 billion are invested then there can be $0.4 billion profit. LTCM can borrow funds and could earn from investing in equity investment. The return on equity investment is higher than the bonds so it should trade on the same strategy.