Nifty closed below 24,900 on Friday, extending its losing streak to a fourth week. Analysts flagged 24,850 as a key level-if broken, a swift drop to 24,500 is likely. Broader markets cracked, but pharma outperformed. Cipla gained 3% on strong results. Bajaj Finance, Sona Comstar, and Chennai Petro dragged on asset concerns and boardroom woes.