v3.22.4
Note 17 - Regulatory Capital (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
  

As of December 31, 2022

 
  Leverage  

Tier 1 Risk

Based

  

Common

Equity Tier 1

  

Total Risk

Based

 
                 

The Middlefield Banking Company

  11.16%  12.63%  12.63%  13.61%

Middlefield Banc Corp.

  11.30%  12.80%  12.25%  13.78%

Adequately capitalized ratio

  4.00%  6.00%  4.50%  8.00%

Adequately capitalized ratio plus fully phased-in capital conservation buffer

  4.00%  8.50%  7.00%  10.50%

Well-capitalized ratio (Bank only)

  5.00%  8.00%  6.50%  10.00%
  

As of December 31, 2021

 
  Leverage  

Tier 1 Risk

Based

  

Common

Equity Tier 1

  

Total Risk

Based

 
                 

The Middlefield Banking Company

  9.80%  12.72%  12.72%  13.97%

Middlefield Banc Corp.

  10.02%  12.96%  12.18%  14.21%

Adequately capitalized ratio

  4.00%  6.00%  4.50%  8.00%

Adequately capitalized ratio plus fully phased-in capital conservation buffer

  4.00%  8.50%  7.00%  10.50%

Well-capitalized ratio (Bank only)

  5.00%  8.00%  6.50%  10.00%