The U.S. stock market seems to be under some pressure this morning as the new week on Wall Street commences. Specifically, the S&P 500 futures are trading about 30 points lower, which suggests some softness at the start of the session. This week, traders will be concentrating on fourth-quarter corporate profits, while also speculating about the Federal Reserve’s next move. Escalating tensions between Russia and Ukraine seem to be another pressing concern, and could contribute to the volatility.