RISK MEASURES (3-Year)As of 3/31/2013
  FUND BENCHMARK
STANDARD DEVIATION 26.30% 25.52%
ALPHA 7.68% 0.00%
BETA 0.99 1.00
EXCESS RETURN 6.33% 0.00%
R-SQUARED 92.94% 100.00%
TRACKING ERROR 6.99% 0.00%
INFORMATION RATIO 0.91 0.00
SHARPE RATIO -0.44 -0.70
MARKET CAPITALIZATIONAs of 3/31/2013 ($ Millions)
  FUND BENCHMARK
Weighted Average 6,364.9 4,651.8
Median 1,574.9 249.6
Weighted Median 2,371.1 1,642.4
TOP HOLDINGSAs of 3/31/2013
Holding % of Net Assets
EATON CORP PLC 5.57%
JOHNSON CONTROLS INC 4.58%
ITRON INC 4.14%
EDP RENOVAVEIS SA 3.79%
CREE INC 3.74%
COVANTA HOLDING CORP 3.56%
ESCO TECHNOLOGIES INC 3.39%
COSAN LTD CLASS A SHARES 3.38%
NEXTERA ENERGY INC 3.02%
SECHILIENNE SIDEC 3.01%
Total 38.19%
ASSET ALLOCATION% of assets as of 3/31/2013
  Equity Fixed Income Cash
Calvert Global Alternative Energy Fund 97.59% 0.00% 2.41%
VALUATIONKey Portfolio Statistics as of 3/31/2013
  1 YEAR P/E 3 YEAR EPS GROWTH RETURN ON
EQUITY
PRICE TO
CASH FLOW
PRICE TO
BOOK
Dividend
Yield
PROJECTED TRAILING PROJECTED TRAILING
Calvert Global Alternative Energy Fund 17.5 19.0 12.3% 20.2% 6.9% 8.1 1.5 1.6
Ardour Global Alternative Energy Index (Composite) 18.9 16.7 12.3% 23.8% 2.8% 7.9 1.3 1.1
PERFORMANCE Average Annual Returns (%) for Period Ended 3/31/2013
  QTR YTD 1 YEAR 3 YEARS 5 YEARS 10 YEARS SINCE
INCEPTION
INCEPTION
DATE
A Shares (NAV) 9.12 9.12 5.35 -11.37 -17.52 n/a -13.89 5/31/2007
Ardour Global Alternative Energy Index (Composite) 10.18 10.18 1.04 -17.28 -20.88 1.68 -16.42  
Lipper Global Natural Resources Funds Index 3.75 3.75 -0.36 0.77 -4.17 12.36 -1.57  
PERFORMANCE ATTRIBUTIONRelative to the Ardour Global Alternative Energy Index (Composite) for the quarter ending 3/31/2013
Performance Attribution Chart
TOP CONTRIBUTORS BY SECTORQuarter ended 3/31/2013
Sector Average Weight Return Contribution
Information Technology 17.60% 17.08% 3.03%
Industrials 32.07% 9.24% 2.90%
Materials 10.65% 13.20% 1.52%
Energy 7.17% 20.99% 1.43%
Consumer Discretionary 7.39% 16.44% 1.16%
TOP CONTRIBUTORS BY HOLDINGQuarter ended 3/31/2013
Holding Average Weight Return Contribution
Cree Inc. 3.83% 61.01% 1.88%
China Everbright International Ltd. 3.25% 40.24% 1.11%
Novozymes A/S 3.91% 21.50% 0.95%
Calgon Carbon Corp. 3.25% 27.64% 0.95%
China Suntien Green Energy Corp. Ltd. 3.21% 24.17% 0.72%
BOTTOM CONTRIBUTORS BY SECTORQuarter ended 3/31/2013
Sector Average Weight Return Contribution
Consumer Staples 0.00% 0.00% 0.00%
Health Care 0.00% 0.00% 0.00%
Telecomm Services 0.00% 0.00% 0.00%
Financials 0.14% 2.01% 0.06%
Utilities 24.97% 0.35% 0.21%
BOTTOM CONTRIBUTORS BY HOLDINGQuarter ended 3/31/2013
Holding Average Weight Return Contribution
Trina Solar Ltd. ADS 1.82% -16.36% -0.52%
Ameresco Inc. Cl A 1.56% -24.57% -0.43%
Iberdrola S.A. 2.33% -13.94% -0.33%
EDP Renovaveis S/A 2.86% -9.11% -0.33%
Polypore International Inc. 1.43% -13.59% -0.30%
REGIONSas of3/31/2013
Region % of Portfolio Benchmark
North America 49.36% 61.14%
Pacific Rim 16.11% 21.28%
South America 3.38% 4.31%
Western Europe 31.15% 13.27%
COUNTRIESas of 3/31/2013
Country % of Portfolio Benchmark
Australia 3.33% 0.13%
Austria 1.57% 1.44%
Belgium 1.97% n/a
Bermuda 2.09% 0.17%
Brazil 3.38% 4.31%
Canada 3.91% 3.98%
Cayman Islands n/a 0.18%
China 6.69% 8.39%
Denmark 0.81% 2.27%
France 4.96% 0.94%
Germany 1.38% 1.38%
Greece n/a 0.14%
Hong Kong 2.51% 2.80%
Italy 5.65% 4.13%
Japan 3.57% 3.41%
Norway n/a 0.39%
Philippines n/a 2.14%
Portugal 3.79% 1.45%
Singapore n/a 0.07%
Spain 2.01% 0.80%
Switzerland n/a 0.13%
Taiwan 0.02% 4.34%
United Kingdom 9.01% 0.19%
United States 43.35% 56.80%
ANALYSIS By Kleinwort Benson Investors International Ltd (Sub-Advisor)

The single biggest detractor from the Fund’s relative return was Cree, an LED lighting firm. Cree has an extremely large weighting in the benchmark, and while the stock is a top-10 holding for the Fund, its weighting in the Fund is only half of its weight in the benchmark. During the first quarter, shares in the company gained over 60% after it announced better-than-expected quarterly results. The Fund’s relative underweight in Cree accounted for most of its relative underperformance in the quarter.

More broadly, the Energy Efficiency sub-sector was once again the leading performer following strong earnings releases for transport and building-efficiency stocks. Better-than-expected housing and construction reports from the United States also boosted confidence in this sub-sector. Housing and auto-related companies in the Fund such as Johnson Controls (up almost 15%) and Tesla Motors (up almost 12%) benefited from the trend.

However, specialty chemical company Johnson Matthey, a Fund holding, performed poorly in this sub-sector. The company’s environmental technologies division is engaged in the production of pollution control devices for the automotive industry, but its precious metal products division suffered from softer platinum prices and weak demand from Europe. The company’s shares are not included in the benchmark index.

Stock selection in the Solar sub-sector was a positive. The Fund avoided some stocks with major losses, including Suntech (down almost 75%) and First Solar (down 12%). More generally, the Solar sub-sector witnessed a strong rally during the first six weeks of the quarter as stabilizing prices and a series of broker upgrades generated fresh optimism. North American downstream producers in the Fund such as Advanced Energy Industries, Canadian Solar, and MEMC Electronic Materials all produced strong returns, while Chinese module manufacturers lagged. Canadian Solar has since been sold.

The Biomass sub-sector posted solid returns during the quarter, driven primarily by the performance of the Fund’s main holdings Cosan, Covanta, China Everbright, and Novozymes, all of which posted better-than-expected annual results. Two of these positions, Novozymes and China Everbright, are not represented in the benchmark and saw significant gains during the quarter. China Everbright is a leading waste-to-energy and wastewater treatment firm in the Chinese market. Waste-to-energy is an emerging trend benefiting from strong government support under current Chinese policy.

Elsewhere, performance in the Wind sub-sector was mixed. Utilities was the worst-performing sub-sector as weaker power prices coupled with lower carbon prices continued to hurt European power producers. However, the Fuel Cell sub-sector was a strong outperformer during the quarter, mainly on stock specific news. For example, shares of Ceramic Fuel Cells, a Fund holding, rose following the confirmation that a German state has approved a subsidy program for combined heat and power (CHP) producers.

10 BEST PERFORMERS FOR THE QUARTER as of 3/31/2013
Rank Company Industry Return
1 China Hydroelectric Corpora *W Exp 01/25/2014 Utilities 401.82%
2 Ballard Power Systems Inc. Consumer Discretionary 68.85%
3 Cree Inc. Information Technology 61.01%
4 ITM Power PLC Industrials 56.64%
5 Lamprell PLC Energy 44.19%
6 Canadian Solar Inc. Information Technology 44.12%
7 China Everbright International Ltd. Industrials 40.24%
8 MEMC Electronic Materials Inc. Information Technology 37.07%
9 Advanced Energy Industries Inc. Information Technology 32.51%
10 China Longyuan Power Group Corp. Ltd. Utilities 29.47%
10 WORST PERFORMERS FOR THE QUARTER as of 3/31/2013
Rank Company Industry Return
1 Ameresco Inc. Cl A Industrials -24.57%
2 4Energy Invest N.V. Utilities -22.55%
3 GCL-Poly Energy Holdings Ltd. Information Technology -18.63%
4 Trina Solar Ltd. ADS Information Technology -16.36%
5 Iberdrola S.A. Utilities -13.94%
6 Polypore International Inc. Industrials -13.59%
7 Verbund AG Utilities -12.22%
8 Johnson Matthey PLC Materials -9.12%
9 EDP Renovaveis S/A Utilities -9.11%
10 Umicore S.A. Materials -7.83%

As of March 31, 2013, Calvert Global Alternative Energy Fund’s holdings included Greencoat UK Wind (2.91% of the Fund’s net assets), Cree (3.74%), Johnson Controls (4.58%), Tesla Motors (2.81%), Johnson Matthey (2.67%), Suntech (0.00%), First Solar (0.00%), Advanced Energy Industries (1.34%), Canadian Solar (0.00%), MEMC Electronic Materials (1.68%), Cosan (3.38%), Covanta (3.56%), China Everbright (1.99%), Novozymes (1.78%), and Ceramic Fuel Cells (2.44%). Calvert may or may not still invest in, and is not recommending any action on, companies listed. For the most recently available information on individual holdings in each Calvert fund, visit www.calvert.com/fundHoldings.html. Current and future portfolio holdings are subject to market risk.

Investment in mutual funds involves risk, including the possible loss of principal invested. The Fund is subject to the risk that stocks that comprise the energy sector may fall in value, and the risk that prices of energy (including traditional sources such as oil, gas or electricity) or alternative energy may fall. The alternative energy sector can be significantly affected by a number of factors, including fluctuations in energy prices, supply and demand of alternative energy fuels, energy conservation, and government regulations and policies. A downturn in the alternative energy industry would impact the Fund more than a fund that does not concentrate in this industry, and the Fund therefore may be more volatile than a typical mutual fund. Foreign investments involve greater risks than U.S. investments, including political and economic risks and the risk of currency fluctuations. The Fund is nondiversified and may be more volatile than a diversified fund.

G200ATT FOR INSTITUTIONAL INVESTOR AND BROKER/DEALER USE ONLY. NOT FOR PUBLIC DISTRIBUTION.