NEW YORK (Reuters) - Washington's bid to put finishing touches on healthcare reform this weekend should help lift uncertainty on Wall Street, but there may be some turbulence along the way next week as the recent rally appears to be fraying.

Orlando, Florida (Reuters) - Regulators must be "significantly tougher" on large and complex financial firms to limit wider risks, but big firms are still needed to keep the global economy humming, Federal Reserve Chairman Ben Bernanke said on Saturday.

NEW DELHI (Reuters) - The board of India's Bharti Airtel on Saturday approved a $9 billion offer for Kuwaiti telecom Zain's African assets, Bloomberg reported, citing two people with knowledge of the negotiations.

ATHENS (Reuters) - Greece has taken the necessary steps to tackle its fiscal crisis and will not default on its debt obligations, the country's prime minister said on Saturday in a speech to his socialist party's national council.

DUBAI (Reuters) - The trillion dollar Islamic finance industry is looking beyond the troubles of Dubai developer Nakheel at possible reforms that could help draw more interest from Western players.

BERLIN (Reuters) - An insolvency mechanism should be set up for nations that are unable to manage their debts, Horst Koehler, Germany's president and a former head of the International Monetary Fund, said in an interview on Saturday.

CHICAGO (Reuters) - A former Lehman Brothers Holdings Inc executive warned months before the bank's collapse that senior management was potentially misleading investors and regulators about the value of the firm's assets, the Wall Street Journal reported on Saturday.

WASHINGTON (Reuters) - President Barack Obama urged lawmakers on Saturday to resist pressure to weaken a financial reform bill and called again for an independent consumer watchdog to help prevent future financial crises.

BERLIN (Reuters) - German Finance Minister Wolfgang Schaeuble said only the most extreme circumstances could justify a bailout of a European Union state from within the union, and any such aid would have to be delivered bilaterally.

BEIJING (Reuters) - China's 2010 inflation goal of 3 percent is tough but achievable, with good grain supplies and excess capacity helping keep prices down, while growth should hit 8 or 9 percent, senior government advisers told a conference on Saturday.