The

Internet Infrastructure HOLDRs

( IIH) ETF was one of the best performers Wednesday, a day after holding

BEA Systems

( BEAS) said its long-term revenue growth target was sustainable through 2008. BEA was trading up 7.2%, boosting the ETF by 19 cents, or 3.6%, to $5.47.

The

PowerShares Dynamic Software

(PSJ) - Get Report

ETF was another strong gainer, recently up 55 cents, or 3.1%, to $18.42.

Oracle

(ORCL) - Get Report

, one of the ETF's major holdings, surged 11.5% after its quarterly results beat Wall Street's forecast.

In addition, the

iShares Goldman Sachs Software Index

(IGV) - Get Report

was rising by 2.9% to $43.71, and the

Software HOLDRs

(SWH)

ETF was gaining 2.3% to $38.79, both thanks to Oracle's advance.

The

PowerShares Dynamic Retail

(PMR) - Get Report

ETF was also among winners, up 2.4% to $18.10. Major holding

Best Buy

(BBY) - Get Report

rose 3.2% after rival

Circuit City

(CC) - Get Report

reported a higher quarterly profit thanks to strong demand in flat-screen TVs.

Meanwhile, ETFs related to oil services were among the weakest performers Wednesday, as oil prices sank under $61 a barrel.

The

PowerShares Dynamic Oil & Gas Services

(PXJ) - Get Report

ETF was dropping 1.4% to $18.24. The

iShares Dow Jones U.S. Oil & Gas Exploration Index

(IEO) - Get Report

ETF was losing 1.2% to $44.16. The

Energy Select Sector SPDR

(XLE) - Get Report

ETF was lower by 1% to $51.79.