The stock market bottomed last March. The rebound essentially ended in November. Since then, it has been in a trading range. The last month it's been looking like it wants to make further moves up. Looking isn't doing. The last two days of declines, are showing that it probably will fail to do so. Time will tell the story.
This is a change in market momentum. It may not be an auspicious time for further investment. If you have been raising cash. You're probably smiling.