the dollar slumped thursday after data showed a slowdown in price increases for october that’s bad news for travelers but stock markets were cheering thursday the dollar has been the king this year the us dollar index ticker dxy which measures the performance of the us currency against a basket of others was up 16 from the beginning of the year through the start of november that performance put the dollar on more even ground with the euro which achieved parity with the greenback at least twice this year the japanese yen in september fell to its lowest levels versus the dollar in 24 years