** Shares of Aadhar Housing Finance AADA.NS rise 2.7% to 456 rupees, set to gain for fourth straight session
** CARE Ratings upgrades credit rating for AADA's non-convertible debenture and subordinate debt issue to AA+ from AA
** Investec says AADA has highest credit rating among Indian affordable housing finance companies with this upgrade
** Says upgrade should improve AADA's cost of funds by 20-25 bps on an incremental basis
** AADA should have lowest cost of funds within its peer set and this should improve its competitive position - Investec
** Trading vols at 801,109 shares, over 2x the 30-day average
** AADA up ~8% YTD
(Reporting by Vijay Malkar)
((VijayDattaram.Malkar@thomsonreuters.com;))