Srinivasan Vaidyanathan
Analyst
I got it. You are asking about the relatively, of course, yes, yes, absolutely, because the change in our composition that we saw when the wholesale moved from 45% to 55%, from a total composition, we did see a significant improvement in the quality of the customer. These were very highly rated corporates, right. Our wholesale customers, wholesale book is at about an average internal rating, call it about 4.3 or so is equivalent to a AA rating, yes, the quality of the book. And one other thing is also the -- and it comes with a lower-risk weights, it comes with lower risk weights anywhere from 20%, 30% and retail comes to the 100% risk weight. Yes, it comes with a different type of risk metrics. And that is why, when the wholesale comes, it will come with a lower margin, cost to income which is very low, virtually no marginal cost to income. And credit cost, our experience on the credit cost has been that you will see that hardly any credit cost that we report on this segment. So whereas on the retail, come with a higher margin, higher cost of origination, higher cost of maintenance. It will come with the credit cost, credit cost can come with a lag too. So that's part of the model. But one thing is from a returns point of view, if you think about the returns, more or less they will be matching, from a ROA, you will see that, call it approximately 2% could be 2.1%, 1.9%, but approximately 2%. Irrespective of the segment in which we operate, we manage to optimize the ROA, because if the margin is low, cost is low, credit cost is low. And so you get to the margins and get to the returns that you want to get. That's how we manage that. And so over a period of when the shift has happened, you see that the ROA remains pretty stable.