Wall Street is navigating another quiet session characterized by low trading volumes in the post-holiday period. The S&P 500 index continues its gradual ascent toward retesting its all-time highs, edging up by just 0.1% as of midday trading in New York. The Nasdaq 100 is mirroring this performance while achieving a significant milestone, boasting a 55% gain since the beginning of the year. This marks its best-performing year since 1999. Blue-chip stocks in the Dow Jones Industrial Average edged 0.1% higher. Small-cap stocks, on the other hand, are taking a breather. The iShares Russell 2000 ET…