The Internet HOLDRs ( HHH) was the biggest loser of exchange-traded funds Wednesday after its largest holding, Yahoo! ( YHOO), posted mixed second-quarter results and warned that its planned search-engine upgrade would be pushed out into the fourth quarter. Shares of the Internet giant were recently trading down $6.51, or 20%, to $25.73. The Internet ETF, meanwhile, was trading down $3.32, or 7%, to $46.22.

ETFs tracking financial services companies got a boost from better-than-expected earnings at JP Morgan ( JPM), Bank of America ( BAC) and Bank of New York ( BK). The Financial Select Sector SPDR ( XLF) gained 78 cents, or 2.5%, to $32.53; the streetTRACKS KBW Capital Markets ( KCE) fund rose $2.31, or 4%, to $55.59; and the iShares Dow Jones U.S. Financial Services ( IYG) ETF jumped $3.52, or 3%, to $119.14.

The iShares Nasdaq Biotechnology Index ( IBB) rose 3% as the fund's major holdings headed higher. The ETF's biggest holding, Amgen ( AMGN), rose 77 cents to $64.95. Vertex Pharmaceuticals ( VRTX) jumped $2.06 to $35. Celgene ( CELG), meanwhile, added $1.38 to $46.55. The biotech ETF recently was trading up $2.35 to $70.29.

The Dow Jones Industrial Average was off to the races Wednesday after Federal Reserve Chairman Ben Bernanke told Congress that economic growth and inflation are both moderating. The Dow recently was adding 225 points to about 11,024. Shares of the Diamonds Trust ( DIA) ETF, which tracks the average, recently gained $2.01, or 2%, to $110.20.

After tumbling on Tuesday, shares of the iShares Silver Trust ( SLV) reversed course on Wednesday as the price of silver moved significantly higher. The metal was recently trading up 63 cents to $11.15 an ounce. The silver ETF, meanwhile, was higher by $5.20, or 5%, to $111.15.

Shares of the U.S. Oil Fund ( USO) slipped 2% as the price of August crude drifted $1.14 lower to $72.40 a barrel. Shares of the Oil ETF were recently down $1.26 to $69.49.

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