National Bank of Greece is trading at $16.30, down 9.19%, amid broad Greek bank-share selling. - On October 23, reports described selling in National Bank of Greece and other major lenders; the Greek banking index fell more sharply than the EuroStoxx Banks index. - Brokers cited foreign-fund position reductions and concerns about factors that could weigh on bank balance sheets. - No verified company-specific announcement was identified; reporting points to sector-wide pressure, not a confirmed National Bank-specific catalyst.