Health-care and biotechnology exchange-traded funds were among the best performers in the ETF world this week, thanks to positive action from
On Thursday, MedImmune jumped 15.3% after it indicated the possibility of a sale of the company. On Friday, Merck jumped 8.3% after lifting its full-year earnings-per-share forecast by 20 cents.
ETF was higher for the week by 3.8%, closing at $82.71. The
HealthShares Emerging Cancer
added 1.2% over the five sessions to end at $27.13.
ETFs tracking metals and mining were also among weekly winners. Gold futures gained roughly 1.5% over the five sessions to close at $689.90 an ounce, and silver futures rose 2.5% to end at $14.09 an ounce.
For the week, the
iShares Silver Trust
was higher by 2.4% to close at $139.90. The
streetTRACKS Gold Shares
ETF added 1.5% to $67.84. The
iShares Comex Gold Trust
tacked on 1.4% to $67.91.
iShares Dow Jones Transportation Average
ETF was another of the week's winners. On Monday, rail concern
Burlington Northern Santa Fe
jumped after a
Securities and Exchange Commission
filing stated that billionaire investor Warren Buffett's
had purchased a 10.9% stake in the company, making it the largest shareholder.
The ETF, which was also aided by lower crude prices for the week, rose $2, or 2.3%, to $90.10.
However, the decline in crude prices weighed on energy-related ETFs. The May crude contract finished a very volatile five-day stretch lower by 1% at $63.63 a barrel. The
United States Oil
ETF was lower by 0.9% to $51.52. The
iPath Goldman Sachs Crude Oil Index
eased 0.6% to $37.75.
Among other decliners, the
B2B Internet HOLDRs
ETF was lower due to rating changes. Holding
sank 3.8% for the week after JMP Securities downgraded the stock Wednesday to market perform from strong buy. The ETF was off 0.9% to finish the week at $2.14.