On Wednesday, Index provider MSCI said it would delay the implementation of an update to the weights of Adani Total Gas and Adani Transmission, two companies in India’s Adani Group, ahead of a benchmark review in May.

MSCI said the reversal of the Adani Total Gas and Adani Transmission updates in the February index review would be reflected in MSCI index product documents starting February 16.

Starting in February, MSCI will also apply special treatment to all related securities of Adani Group in the MSCI equity indices.

MSCI said last week it would cut the weight of four Adani group companies, including flagship Adani Enterprises, in its index after reassessing the number of freely traded shares.

The new index weights were due to take effect on March 1, but the proposed changes to Adani Total Gas and Adani Transmission will be delayed until May.

MSCI said “potential replicability issues” were behind the decision. Its methodology calls for replicating the index “in a real portfolio in a cost-effective manner”.

Weight changes for Adani Enterprises and ACC (the major Indian cement company acquired by Adani Group from Holcim last year) will continue.

MSCI examined the company’s free float size and determined “sufficient uncertainty” among some of Adani’s investors.

MSCI’s decision came after a January 24 report by US short-seller Hindenburg Research accused the Indian conglomerate of improperly using offshore tax havens and manipulating shares. The group has denied any wrongdoing.

The Hindenburg report plunged Adani, led by billionaire Gautam Adani, into crisis, wiping about $120 billion off the market value of the group’s companies.

Adani, which has been caught in a storm of short selling in recent weeks, and its two main subsidiaries will hold conference calls with bond investors on February 16 and February 21, according to a document seen by Reuters.