The dollar strengthened on Friday against its main rivals after official data showed sales at U.S. retailers rebounded in September after slumping over the summer. One dollar bought 104.36 yen, up 0.7% at 104.64 yen late Thursday in New York. The euro tumbled to $1.1000, down 0.4% from $1.1052 late Thursday. The pound sunk to $.1.2233, erasing an earlier rally. It traded at $1.2241 late Thursday. The producer price index, which measures prices paid to U.S. producers for their goods, increased by 0.3% in September. The PPI is considered an early indicator of consumer-price inflation, because rising prices at the wholesale level are typically passed along to consumers.
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