Prime Minister Narendra Modi has claimed the bullet train offered to India by Japan is virtually free of cost. A 50-year yen loan amounting to Rs 88,000 crore at 0.1 % interest is being described by the prime minister as free of cost. This is patently absurd.

India can have as many bullet trains as it wants on these terms from the Japanese, but nobody should be misled into believing they are free. For one, India may have to repay much more than Rs 88,000 crore over a 50-year period because the rupee will most likely depreciate against the Japanese yen over a long period. Why is ...