US inflation picked up last month as prices rose for gas, eggs, and used cars, yet the AP reports underlying price pressures also showed signs of easing a bit. Wednesday's report from the Labor Department showed that the consumer price index rose 2.9% in December from a year ago, the highest since July and the "fastest one-month increase in overall prices since February," per the New York Times. It was the third straight increase after inflation fell to a 3.5-year low of 2.4% in September. Yet excluding the volatile food and energy categories, so-called core inflation declined to 3.2%, after remaining stuck at 3.3% for three months in a row. A decrease had not been expected, and CNBC reports Dow futures jumped 695 points on the news (sky-high quarterly earnings reports from US banks played into this, too). More: