The funding is often arranged through overseas banks backed either by shares or assets of the target company and/or guarantees by the Indian parent. So far companies have largely used a mix of their retained earnings (internal source) and borrowings (external source) to finance their overseas acquisition.
In terms of frequency, monetary policy tends to follow the business cycle, whereas macroprudential policy is related to the financial cycle. Certainly, these cycles are not independent from one another. But the BIS has calculated that the financial cycle in advanced economies has an average length of about 16 years, whereas business cycles tend to have a duration of 1 to 8 years.