NEW YORK (TheStreet) -- Six of the 10 best-performing exchange traded products rode the resurgence in commodity prices in February. The iPath Dow Jones-UBS Cotton Subindex Total Return ETN (BAL) - Get Report spun its way to a return of 18% for the month.

The

iPath Dow Jones-UBS Nickel Subindex Total Return ETN

(JJN) - Get Report

topped the four metals investments, returning 15% by tracking the spot value of nickel. Third-best was

SPDR S&P Metals & Mining ETF

(XME) - Get Report

, up 11% on holdings of mining shares such as

Freeport-McMoRan Copper & Gold

(FCX) - Get Report

,

Newmont Mining

(NEM) - Get Report

and

Alcoa

(AA) - Get Report

.

Today's economy is not built on raw materials alone. Building most new products, from cell phones to baby dolls, involves embedding semiconductor chips. Chips, which must be ordered with sufficient lead time at the beginning of a new-product cycle, are an early indicator of better economic times to come.

Funds fully participating in this trend include the

PowerShares Dynamic Semiconductors Portfolio

(PSI) - Get Report

, up 11%; and the

SPDR S&P Semiconductor ETF

(XSD) - Get Report

, up 9.2%. Both funds hold

Intel

(INTC) - Get Report

,

Texas Instruments

(TXN) - Get Report

and

Micron Technology

(MU) - Get Report

, although the SPDR is the more liquid fund to trade.

Improbably, with oil surging back over $80 a barrel, not only is a fund tracking oil in the top-10 performers for February, but so is an airline fund. The

iPath Goldman Sachs Crude Oil Total Return Index ETN

(OIL) - Get Report

gained 9.2%, while the

Claymore/NYSE Arca Airline ETF

(FAA)

ascended 11%.

For the best rated exchange-traded funds, check out our

Top Rated ETFs

page.

-- Reported by Kevin Baker in Jupiter, Fla.

Kevin Baker became the senior financial analyst for TSC Ratings upon the August 2006 acquisition of Weiss Ratings by TheStreet.com, covering mutual funds. He joined the Weiss Group in 1997 as a banking and brokerage analyst. In 1999, he created the Weiss Group's first ratings to gauge the level of risk in U.S. equities. Baker received a B.S. degree in management from Rensselaer Polytechnic Institute and an M.B.A. with a finance specialization from Nova Southeastern University.