Winners & Losers

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This Week's ETF Winners & Losers

Robert Holmes

Health-care and biotechnology exchange-traded funds were among the best performers in the ETF world this week, thanks to positive action from MedImmune (MEDI Quote - Cramer on MEDI - Stock Picks) and Merck (MRK Quote - Cramer on MRK - Stock Picks).

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.

The Pharmaceutical HOLDRs (PPH Quote - Cramer on PPH - Stock Picks) ETF was higher for the week by 3.8%, closing at $82.71. The HealthShares Emerging Cancer (HHJ Quote - Cramer on HHJ - Stock Picks) 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 (SLV Quote - Cramer on SLV - Stock Picks) was higher by 2.4% to close at $139.90. The streetTRACKS Gold Shares (GLD Quote - Cramer on GLD - Stock Picks) ETF added 1.5% to $67.84. The iShares Comex Gold Trust (IAU Quote - Cramer on IAU - Stock Picks) tacked on 1.4% to $67.91.

The iShares Dow Jones Transportation Average (IYT Quote - Cramer on IYT - Stock Picks) ETF was another of the week's winners. On Monday, rail concern Burlington Northern Santa Fe (BNI Quote - Cramer on BNI - Stock Picks) jumped after a Securities and Exchange Commission filing stated that billionaire investor Warren Buffett's Berkshire Hathaway (BRK.A Quote - Cramer on BRK.A - Stock Picks) 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 (USO Quote - Cramer on USO - Stock Picks) ETF was lower by 0.9% to $51.52. The iPath Goldman Sachs Crude Oil Index (OIL Quote - Cramer on OIL - Stock Picks) eased 0.6% to $37.75.

Among other decliners, the B2B Internet HOLDRs (BHH Quote - Cramer on BHH - Stock Picks) ETF was lower due to rating changes. Holding CheckFree (CKFR Quote - Cramer on CKFR - Stock Picks) 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.