Aviation stocks, Dec. 3 -- Aviation sector stocks will be in focus of the stock market investors after the Supreme Court's hearing on potentially increasing the User Development Fee (UDF) for customers travelling from Mumbai and Delhi airports.

A recent Telecom Disputes Settlement and Appellate Tribunal (TDSAT) order has redefined the formula for calculating airline tariffs between the 2009-2014 fiscal year, resulting in two of India's largest airports owing more than Rs.50,000 crore in unpaid dues.

Media reports have suggested that the amount due is likely to be collected from the passengers through the user development fees (UDF) component, which is included in their ticket fare.

This potential move is, in turn, likely to make the ai...