New Delhi: Indian markets tumbled on on Thursday as Wall Street worried about the fiscal crisis and the European economy's further deterioration, underpinning the safe-haven dollar and yen as well as US Treasuries on safety bids. US Congress must avert the fiscal cliff of nearly $600 billion worth of spending cuts and tax increases set for early 2013. There is also the issue of a debt ceiling, which needs to be raised to avoid a government shutdown.
