mUMBAI, May 23 -- With the rupee at the cusp of hitting 100 against a dollar, everybody is interested in, and has, a view on the exchange rate right now. Views and predictions aside, how does the situation look like, historically speaking? HT has looked at the numbers to distil the good (there is), the bad and the ugly of the current churn in the foreign exchange markets right now. Let us look at them one by one. The rupee-dollar exchange rate is as much a sentiment shaper as it is a tangible factor for the economy. To be sure, the sentiment matters because foreign exchange markets have a tendency to enter self-fulfilling spirals. The ongoing fall in the rupee's value is concerning for precisely this reason, but it is not the worst India ha...