December Nasdaq-100 futures rallied for a fourth consecutive session, gaining 6.16% from recent lows to reach a high of 25,376. Soft economic data fueled the move, as Chicago PMI fell to 36.3, missing expectations of 44.3 and signaling contraction. This weak growth data reinforced expectations for Federal Reserve rate cuts. Additionally, the U.S. Treasury yield curve flattened, with the 2-year/10-year spread narrowing to 52 basis points, potentially providing a tailwind for the tech-heavy index.