Question: American global investment is headquartered in what city? 

Context paragraphs:
Principal Group: "For the unrelated American global investment management organization, see Principal Financial Group."

UOB-Kay Hian: UOB Kay Hian Holdings Limited () is a Singapore-based, global investment bank that engages in brokerage services, private wealth management, investment banking, investment management and financial research.  UOB Kay Hian was founded in the early 1900s by the late Khoo Kay Hian as Kay Hian & Co (Pte).  It is headquartered at Singapore, with additional offices in Hong Kong, Shanghai, Jakarta, Manila, London, Toronto, Kuala Lumpur, Bangkok and New York City.  Following its incorporation in June 1970 and the merger of Kay Hian Holdings with UOB Securities in October 2000, UOB Kay Hian Holdings was established.

China International Fair for Investment and Trade: The China International Fair for Investment and Trade (CIFIT, simplified chinese:中国国际投资贸易洽谈会, traditional chinese:中國國際投資貿易洽談會), approved by the State Council of the People's Republic of China, takes place on September every year in Xiamen, China.  Themed on Introducing FDI and Going Global, CIFIT features a focus upon nationality and internationality, upon investment negotiation and investment policy promotion, upon coordinated development of national and regional economy, and upon economic and trade exchanges across the Taiwan Strait.  CIFIT is currently China's only international investment promotion event aimed at facilitating bilateral investment.  It's also the largest global investment event approved by UFI.

Jefferies Group: Jefferies LLC is an American global investment bank and institutional securities firm headquartered in New York.  The firm provides clients with capital markets and financial advisory services, institutional brokerage, securities research, and asset management.  This includes mergers and acquisitions, restructuring, and other financial advisory services.

David Darst: David Martin Darst, CFA, is an American financier, educator, author, and triathlete.  For 17 years, he was a Managing Director and Chief Investment Strategist of Morgan Stanley Wealth Management, where he served as Vice Chairman of the Morgan Stanley Wealth Management Global Investment Committee.  He was the founding President of the Morgan Stanley Investment Group, and the founding Chairman of the Morgan Stanley Asset Allocation Committee.  Since 2014, he has served as an independent Senior Advisor to and a member of the Morgan Stanley Wealth Management Global Investment Committee.  David Darst twitter handle is @David_Darst

BlackRock: BlackRock, Inc. is an American global investment management corporation based in New York City.  Founded in 1988, initially as a risk management and fixed income institutional asset manager, BlackRock is the world's largest asset manager with $5.7 trillion in assets under management as of July 2017.  BlackRock operates globally with 70 offices in 30 countries and clients in 100 countries.  Due to its power, BlackRock has been called the world's largest shadow bank.

Global Investment House: Global Investment House (Global) is an investment company incorporated in 1998, and falls under the regulation of the Capital Markets Authority of Kuwait.  In late 2008 and early 2009 Global was hit by cash flow problems affecting its operations in several countries.  Kuwait's Global Investment House 2010 loss $260 million.

Guggenheim Partners: Guggenheim Partners is a global investment and advisory financial services firm that engages in investment banking, capital markets services, investment management, investment advisory, and insurance services.  The firm is headquartered in New York City and Chicago with 2,300 staff located in 20 cities throughout the United States, Europe, and Asia.  It has more than $290 billion of assets under management.  The firm's CEO is Mark Walter.  It has six Managing Partners who are key executives, and with a Senior Leadership Team of 17 other executives, oversee the Firm's businesses.  It was founded by Peter Lawson-Johnston II, Solomon R. Guggenheim's great-grandson.

Dubai Holding: Dubai Holding (Arabic: دبي القابضة‎ ‎ ) is a global investment holding company that develops and manages an extensive portfolio of companies focused on investments, financial services, real estate, specialized business parks, telecommunications and hospitality.  It is majority owned by Sheikh Mohammed bin Rashid Al Maktoum, the Ruler of Dubai, and the primary founder of Dubai Inc.).  Abdulla Al-Habbai has been chosen as chairman by Dubai ruler Sheikh Mohammed bin Rashid al-Maktoum.  The global investment conglomerate operates in 12 countries, employing over 20,000 people.  It continues to make huge strides in its successful strategy, aimed at creating an innovation-driven knowledge-based economy.

Principal Financial Group: The Principal Financial Group is a global financial investment management leader headquartered in Des Moines, Iowa.

Supporting paragraphs: Principal Group Principal Financial Group
Answer: Des Moines, Iowa