Today's Hot Topics:

1. The Federal Reserve keeps interest rates unchanged;

2. The S&P 500 index breaks the 7,000-point mark for the first time;

3. Fidelity will launch the stablecoin FIDD on Ethereum;

4. Crypto PAC Fairshake's cash reserves rise to $193 million;

5. Powell: Most of the inflation exceeding expectations comes from tariffs rather than demand;

6. Tesla did not make any adjustments to its Bitcoin holdings in the fourth quarter;

7. CNBC: Nvidia and Amazon may participate in this round of OpenAI financing;

8. The Federal Reserve raises its assessment of U.S. economic activity, stating it is expanding at a "robust" pace.

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