Marketplace examines a "frozen pond" labor market where low churn leaves long-term unemployed stuck, while AI insiders gather in San Francisco to debate existential risks and regulation. The Fed’s $6.7 trillion balance sheet faces scrutiny as experts discuss shrinking assets, and winter heating costs vary by region due to natural gas surpluses and oil price spikes. The personal saving rate hits a four-year low as inflation and stock market wealth impact households at both income extremes. Finally, retired IT professionals share their post-career projects, and the CBO reports a $2 trillion d…