Homebuilding and construction-related exchange-traded funds were the best performers of the week, as several homebuilders benefited from an analyst upgrade.

On Monday, Citigroup upgraded

Centex

(CTX)

,

Lennar

(LEN) - Get Report

,

Pulte Homes

(PHM) - Get Report

,

D.R. Horton

(DHI) - Get Report

and

Ryland Group

(RYL)

to buy from hold, as the firm believed a near-term bounce was coming due.

Housing stocks also rallied Tuesday despite a weak report from the National Association of Realtors, which said that pending home sales dropped a greater-than-expected 6.5% in August. Economists expected a 2% decline in sales.

For the week, the

iShares Dow Jones U.S. Home Construction

(ITB) - Get Report

jumped 14.2% to $22.70. The

SPDR S&P Homebuilders

(XHB) - Get Report

climbed 9.2% to $23.37.

Financial ETFs were also higher for the week, following several M&A headlines out of the sector.

Citigroup

(C) - Get Report

said Tuesday it will acquire the rest of Nikko Cordial, a Japan-based broker, for $4.6 billion. On Monday, Citigroup was part of a rally in the financial sector, despite acknowledging that third-quarter earnings should drop 60% from a year ago.

Another deal Tuesday saw

Commerce Bancorp

(CBH) - Get Report

TheStreet Recommends

, a New Jersey bank, acquired by Canada's

TD Bank

(TD) - Get Report

for $8.5 billion in stock and cash. Additionally,

Royal Bank of Canada

(RY) - Get Report

laid out plans to buy a Caribbean bank, RBTT Financial Group, for roughly $2.2 billion.

The

Ultra Financial ProShares

(UYG) - Get Report

advanced 9% to $62.55. The

iShares Dow Jones U.S. Broker-Dealers

(IAI) - Get Report

was higher by 5.6% to $54.92. The

KBW Bank

(KBE) - Get Report

ETF added 3.8% to $54.37.

Overseas-related ETFs were also among the top winners of the week as Asia markets were higher. Over the five sessions, Japan's Nikkei rose 1.7% and Hong Kong's Hang Seng rose 1.5%.

The

iShares FTSE/Xinhua China 25 Index

(FXI) - Get Report

advanced 6.4% at $191.60. The

SPDR S&P China

(GXC) - Get Report

added 5.1% to close at $98.67. The

PowerShares Golden Dragon Halter USX China

(PGJ) - Get Report

gained 3.8% to $34.59.

The

United States Natural Gas

(UNG) - Get Report

ETF was one of the week's laggards, although still finished with slight gains. Natural gas prices slid 4.7% on Friday to $7.07 per million British thermal units, but still added 2.9% over the five sessions. The ETF rose 2.3% to $39.12.