from MacroScope:

Graphic: GDP of the G20 Nations

The G20 is made up of the finance ministers and central bank governors of 19 countries and the European Union.

The day ahead: Tuesday


IPOs from Colony Financial and Apollo Commercial Real Estate kick off the biggest week for U.S. IPOs in nearly two years.

In other news:

*  The Federal Reserve begins its two-day open markets committee meeting.

*  World leaders meet at U.N. headquarters in New York for a one-day climate summit.

Graphic: G20 Summit Protests


Graphic: Census of the Arctic


The day ahead: Friday


Light on earnings and economic data, equity markets may be volatile on this quadruple witching day.

*  Friday marks the quarterly expiration and settlement of four different types of September equity futures and options contracts. The “quadruple witching” can lead to greater volume and volatility as players adjust and exercise derivative positions.

The day ahead: Thursday


Investors will eye FedEx and Palm quarterly results for signs of strength as well as data from the housing sector.

*  FedEx reports fiscal first-quarter earnings before the bell. The package delivery giant is expected to benefit from stabilizing freight volumes as well as lower fuel prices.

Graphic: China emissions targets


An international goal to limit global warming to no more than 2 degrees Celsius appears unreachable even if China embarks on a vast effort to tame its growing greenhouse gas emissions, a Beijing think-tank has said.