In a recent decision the Istanbul Stock Exchange (İstanbul Menkul Kıymetler Borsasında or İMKB) to extend the second (afternoon session) by 30 minutes.
Beginning October 19 the IKMB will close at 17:30 instead of 17:00 as is the case today.
The new hours will be (starting October 19, 2009:
1. Session: 09:30 – 12:30, 2. Session:14:00 – 17:30
[Source: Hürriyet]