Stocks start the week with solid gains ahead of the big January CPI report that comes out tomorrow morning; Is Norfolk Southern at risk of a big liability related to its train derailment and chemical spill (the market does not yet think so); The yield curve inversion signals concerns about recession but that could be many months away; MNDY pops after robust revenue growth guidance; FSLY spikes higher on an analyst price target upgrade; FIS sinks after issuing weak 2023 guidance;