Exchange-traded funds related to financials were the worst performers of a losing week following several disappointing quarterly reports.

Over the course of the week,

Citigroup

(C) - Get Report

,

Wells Fargo

(WFC) - Get Report

,

Bank of America

(BAC) - Get Report

and

Washington Mutual

(WM) - Get Report

, among others, were out with lackluster earnings reports. Each fell by at least 8%.

The

Ultra Financial ProShares

(UYG) - Get Report

ETF tumbled 14.3% to $52.10. The

iShares Dow Jones U.S. Broker-Dealers

(IAI) - Get Report

ETF was lower by 6.9% to $51.32. The

KBW Bank

(KBE) - Get Report

ETF lost 6.8% to $49.54.

ETFs tracking homebuilders were also among the worst decliners as concern from the

Federal Reserve

, weak economic data and an earnings warning joined to sink the sector. Late Monday, Fed Chairman Ben Bernanke was out with negative comments, saying that "the further contraction in housing is likely to be a significant drag on growth in the current quarter and through early next year."

On Tuesday, homebuilder

D.R. Horton

(DHI) - Get Report

said that fourth-quarter net sales were nearly halved to $1.3 billion from a year ago due to cautious buyers and a tough housing environment.

The news got worse on Wednesday, when the Census Bureau said that housing starts plummeted 10.2% last month to a 14-year low. Building permits tumbled 7.3% to 1.22 million, also below expectations.

For the week, the

iShares Dow Jones U.S. Home Construction

(ITB) - Get Report

ETF sank 10.7% to $19.40. The

SPDR S&P Homebuilders

(XHB) - Get Report

ETF shed 9.9% to $20.72.

Retail-related ETFs also finished with losses for the week. Among individual names,

Wal-Mart

(WMT) - Get Report

,

Lowe's

(LOW) - Get Report

,

Home Depot

(HD) - Get Report

,

Target

(TGT) - Get Report

and

Amazon.com

(AMZN) - Get Report

were all lower by 2.8% or more.

The

SPDR S&P Retail

(XRT) - Get Report

ETF ended down 7.8% to $37.38. The

PowerShares Dynamic Retail

(PMR) - Get Report

ETF eased 6.3% to $17.11. The

Retail HOLDRs

(RTH) - Get Report

fell 5.5% to $96.48.

On the other hand, energy-related ETFs were among few winners as crude set multiple records during the week. The November benchmark contract broke the $90-a-barrel level, adding 5.9% over the course of the week to close at $88.60.

The

United States Oil

(USO) - Get Report

added 4.9% to $67.14. The

iPath S&P GSCI Crude Oil Index

(OIL) - Get Report

ETF finished up 4.9% to $49.71.