The weekly options expiry dominated the session on Thursday as the index stayed much within a defined range on expected lines. Apart from that, the Indian markets ended on a disappointing note as it failed its attempt to break out from the falling channel as it slipped inside it again. The Nifty opened on a mildly positive note and marked its high in the early minutes of the session after which it slipped into the negative territory. The markets stayed negative throughout the session, but mostly remained rangebound. The last hour and a half saw the weakness getting intensified and the index slipped lower, finally ending with a net loss of 124.10 points or 0.83 per cent.