The

iShares Dow Jones U.S. Broker-Dealers

(IAI) - Get Report

exchange-traded fund was one of the week's best performers, helped along by

TST Recommends

Morgan Stanley

(MS) - Get Report

.

For the week, the ETF added 5.1% to finish at $54.11.

Bundled securities tracking the energy sector also gained ground over the five sessions. The May crude contract, which became the front-month instrument on Wednesday, jumped $3.03 during the last three sessions to finish at $62.28 a barrel.

The

United States Oil

(USO) - Get Report

ETF added 4.4% to $50.57. The

iPath Goldman Sachs Crude Oil Index

(OIL) - Get Report

ETF rose 4.5% to $36.92.

The

PowerShares Lux Nanotech

(PXN)

ETF was another of the week's biggest winners. Holding

Cambridge Display Technology

(OLED) - Get Report

surged more than 14% over the five sessions, and the ETF was higher by 4.3% at $17.54.

On the other hand, the

Broadband HOLDRs

( BDH) ETF was one of few big losers for the week. On Monday, holding

Nortel

( NT) fell hard after the company reported that revenue for the first quarter and full year will be flat to slightly lower than in 2006. The ETF gave back 1.7% to finish the week at $15.75.

The

iShares Lehman 20+ Year Treasury Bond

(TLT) - Get Report

was also among the decliners. The losses came after the

Federal Reserve

decided to keep its federal funds target unchanged at 5.25% for the sixth straight meeting.  

However, the Fed also said that readings on core inflation "have been somewhat elevated," and that "the committee's predominant policy concern remains the risk that inflation will fail to moderate as expected." For the week, the yield on the 10-year Treasury, which moves inversely to the price, rose to 4.61% from 4.55%. The yield on the 30-year bond moved to 4.80% from 4.69% last Friday.

The iShares Lehman 20+ Year Treasury Bond ETF eased 1.2% to $88.80.