Although February has the fewest trading days of any month, exchange-traded funds still racked up healthy inflows from investors. Inflows into US based ETFs and ETNs grew by $5.4 billion in February 2010.

Assets in exchange-traded funds and notes in the United States now top $765 billion, a gain of 66% over February 2009. In addition, the number of listed exchange-traded products grew from 843 to 964, well under the percentage change in assets, reflecting a trend of asset consolidation among the largest ETFs, according to a press release.

Fixed income investments remain the biggest breadwinners, taking in $2.3 billion in net inflows and continuing a trend of monthly inflows for more than a year. US stocks rebounded slightly from January’s $19.6 billion outflow to add $5.8 billion in February.

Troubles in Greece have only incited the popularity of exchange-traded commodities in the wake of what could be the largest bankruptcy since the credit crunch began.

Often suffering from limited liquidity, currency funds are now on the up and up. The CurrencyShares Euro Trust (FXE: Quote, Profile, Advanced Chart, News), which has an average volume just under 580,000 shares daily, posted volume of over three million shares on February 19, the day Greece’s debt issues came to light. Since that time, the volume has increased over 60%, reaching nearly one million shares daily.

Although overall volume for the 30 different currency ETFs on the market remains thin, a growing number of ETF investors are using exchange-traded currencies as a way to hedge their portfolios. The sector recorded $7 billion in assets under management in February, MarketWatch reports.

Facing stiff competition from other fund sponsors, Emerging Global Shares brought its newest fund to market in just four months, hoping to quell interest from other fund issuers in emerging markets.

The Brazil Infrastructure Index ETF (BRXX: News) builds on a general interest among investors in both emerging-market and infrastructure sector ETFs. The fund will track 30 of the largest companies in the sector that operate in Brazil and mirror returns of the INDXX Brazil Infrastructure Index, according to a press release.

The funds largest holdings by sector are Metals and Mining (14.25%), Telecommunications (14.18%), Utilities (12.25%), Power Producers (11.27%) and Transportation Infrastructure (8.15%). The fund will trade with a .85% annual expense on the NYSE Arca exchange.

Emerging Global Shares could not have picked better timing with the release of its new China Infrastructure Fund (CHXX: News). Amidst stimulus efforts undertaken around the world, investors have been eying infrastructure names as sound investments in a shaky economic climate.

The China Infrastructure Index ETF will invest in the 30 largest companies that center around infrastructure development within China’s borders. Companies in the mix have an average market capitalization of $8.3 billion, making the ETF a purely large-cap investment, according to Forbes. The fund holds sectors including real estate, metals and mining, construction, and engineering.

The fund will trade at an annual expense of just .85% and was launched at $20 per share. The fund advanced 3.8% in its first day of trading on the NYSE Arca exchange, with volume of just under 14,000 shares.

Option volume in the Market Vectors Russia (RSX: Quote, Profile, Advanced Chart, News) indicates that Russian markets may soon enter a bear market. Uncharacteristic put volume reflects a dip of greater than 17% by May.

Open interest on the popular ETF rose to 60,608 put contracts, 2.42 times as many call contracts, which suggest a dip is in order. Of all the contracts, the $25 May puts were the most active, signaling that investors are looking for a 17% decline in Russian stocks by May expiration, which is just three months away, BusinessWeek reports. Nearly a fifth of all option action in the Market Vector’s fund is in the May $25 put.

Already Russia’s Micex Index has fallen some 8.3% since January highs, and analysts suspect the index will continue to decline as Russia’s top export, oil, remains inexpensive.