Exchange-traded funds tied to natural gas were on the rise Wednesday, as prices surged a day before the latest inventory report.

Recently, natural gas jumped 25 cents to $6.18 per million British thermal units. According to Bloomberg, natural gas inventories rose by 61 billion cubic feet last week. The data from the Energy Department is due at 10:30 a.m. EDT Thursday.

The United States Natural Gas ( UNG) ETF was up $1.41, or 3.8%, to $38.39, a gain of 12% so far this week. The First Trust ISE-Revere Natural Gas ( FCG) ETF was adding 56 cents, or 2.9%, to $19.70.

Crude oil-related ETFs were also on the rise following bullish inventory data. Earlier, crude oil topped $79 a barrel for the first time ever, after the Energy Department said that crude stocks dropped a greater-than-expected 7.1 million barrels last week. The front-month October contract was recently up 67 cents to $78.90.

The Ultra Oil & Gas ProShares ( DIG) was rising $2.12, or 2.1%, to $102.95. The PowerShares Dynamic Energy ( PXI) was up 53 cents, or 1.6%, to $33.51. The SPDR S&P Oil & Gas Exploration & Production ( XOP) ETF gained 84 cents, or 1.9%, to $45.62.

Bundled securities tracking the biotech sector were also higher thanks to Amgen ( AMGN). Earlier, UBS upgraded Amgen to neutral from sell after the Food and Drug Administration panel rejected a proposal that would limit the use of anemia drugs.

The Biotech HOLDRs ( BBH) was higher by $1.92, or 1.1%, at $174.18. The First Trust Amex Biotechnology Index ( FBT) was adding 24 cents, or 1%, to $25.42. The iShares Nasdaq Biotechnology ( IBB) was up 73 cents, or 0.9%, to $82.43.

On the other hand, ETFs tracking silver futures were among the worst performers of Wednesday's session, as silver lost 13 cents to $12.70 an ounce. Gold and copper were also trading weaker.

The PowerShares DB Base Metals ( DBB) was down 23 cents, or 0.9%, to $24.79. The iShares Silver Trust ( SLV) slid $1.32, or 1%, to $125.08. The PowerShares DB Silver ( DBS) was off 26 cents, or 1%, to $24.74.

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