Nasdaq 100 Analysis - The Nasdaq 100 has shown upward momentum, with expectations to reach the 26,000 level in the near term [1] - The market is viewed as a buying opportunity during dips, especially considering the holiday-shortened week [1] S&P 500 Analysis - The S&P 500 is poised to challenge recent all-time highs around 6,933, with potential to reach 7,000 if it breaks that level [2] - The market is expected to be thin later in the week, but historically, the week of Christmas performs well due to traders adjusting positions for the new year [2]