Bihar Sponge Iron has announced the closure of its trading window for Designated Persons, including Directors, Promoters, and their immediate relatives. This closure is effective from 1st July and will remain in effect until 48 hours after the company declares its financial results for the first quarter ended 30th June. This measure aligns with the company's code of conduct, preventing those with inside information from trading before the quarterly results are made public. The specific date for the board meeting to approve these results will be announced subsequently.