Wall Street's main indexes opened flat to slightly higher in Tuesday's shortened trading session, with U.S. stocks entering a historically strong period before rounding off their second consecutive year of gains.

However, what goes up often comes down, but H.C. Wainwright analyst Scott Buck thinks SoundHound stock has enough fuel in the tank to climb higher. On Dec. 23, he raised his bank's price target to $26 per share and maintained his buy rating. The new target implies a gain of 19.5% from SoundHound's closing price on Dec. 22.

Stocks shook off a choppy start to finish higher Monday, as Wall Street kicked off a holiday-shortened week. The S&P 500 ended 0.7% higher after having been down 0.5% in the early going. The Dow Jones Industrial Average also recovered from an early slide to eke out a 0.2% gain. The tech-heavy Nasdaq composite rose 1%.