A flurry of trading in Bristol, Va.-based Charter Federal Savings Bank stock at the end of last week sparked rumors of a takeover.

On Friday, 87,500 shares changed hands, representing a 1035% jump above its average daily trading volume. This was on top of the 50,000 that had been traded the previous day. The two-day total was about 50% more than the stock's activity for all of January.

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