Although we don't believe in timing the market or panicking over daily movements, we do like to keep an eye on market changes -- just in case they're material to our investing thesis.

The holiday-week rally that has sent the Dow Jones Industrials (DJINDICES:^DJI) higher in each of the past six sessions showed some signs of weakening Friday morning, as the Dow gave up early gains to fall three points as of 10:45 a.m. EST. Without any major economic news, year-end optimism allowed stocks to coast higher before falling back to earth, but other financial markets saw more momentous events that helped ExxonMobil (NYSE:XOM) and Chevron (NYSE:CVX) climb even as Travelers (NYSE:TRV) posted declines.

Exxon and Chevron both gained ground Friday morning as the price of front-month futures on West Texas Intermediate crude oil climbed above the $100 mark for the first time since October. Energy prices have risen around the world, with Brent recently climbing above $110 to rival its best levels since before the financial crisis. Exxon's 0.6% gain beat out peer Chevron's rise of 0.3%, continuing the relative outperformance of the larger Dow energy component since Warren Buffett announced his interest in the oil giant. Yet for both Exxon and Chevron, investors are looking for rising energy demand from stronger economies globally to boost both stocks' prospects, potentially opening up new sources of economically viable oil and natural gas for further exploration and production.

Meanwhile, at the other end of the macroeconomic spectrum, interest rates continued moving higher, with the 10-year Treasury yield rising above the 3% mark again. That's bad news for Travelers, which fell 0.5% as investors weighed the potential impact on the insurance giant's bond portfolio. Rate sensitivity sent Travelers into a momentary tailspin at midyear, when the Federal Reserve started contemplating how it would start reducing the amount of support it was giving the economy from quantitative easing. Now that tapering has actually begun, Travelers and other rate-sensitive stocks could see renewed pressure if the bond market panics and sends long-term rate yields much higher.

Fool contributor Dan Caplinger has no position in any stocks mentioned. You can follow him on Twitter @DanCaplinger. The Motley Fool recommends Chevron. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.