The best ETF investments at the moment are biotechs and international bonds, according to the Ned Davis Research Group of Venice, Fla. In an "ETF Highlights" report sent Tuesday, Ned Davis ETF strategist Neil Leeson writes that these groups sport the most bullish trends according to the firm's "take indicators." "Biotech funds have been the real leaders in the sector this year," Leeson wrote. "Nearly all of them are oversold, and the recent