The Dow Jones Industrial Average plunged 149.34 points (1.58 per cent) to 9297.77 in the first three minutes of trade, a day after slumping 5.11 per cent.
On Monday the blue-chip index fell below 10,000 for the first time in four years.
The tech-heavy Nasdaq composite index slid 34.23 points (1.95 per cent) to 1720.65 and the Standard & Poor`s 500 index dropped 17.78 points (1.78 per cent) to 978.45.
Major central banks launched an exceptional joint effort to battle the global financial crisis overnight, simultaneously slashing interest rates on three continents to bolster battered markets.
The Federal Reserve, European Central Bank, Bank of England and peers in Canada, Sweden and Switzerland slashed key rates by a half percentage point, sending their strongest signal of support since just after the September 11, 2001 terror attacks in the US.
