Middlefield Group is switching the calculation of the net asset value (NAV) of its closed-end funds to a weekly basis. The company says the change is consistent with industry practice.

The change affects the COMPASS, PATHFINDER, MAXIN, MINT and SAGE Income Funds and MRF 2002, MRF 2002 II, MRF 2003 and MRF 2003 II Resource Limited Partnerships.

Currently, daily NAV’s are made available to the financial press for publication and are posted on the Middlefield Web site.

Effective December 18, the NAV per unit calculated on Thursday of each week (or if any Thursday is not a business day, then on the immediately preceding business day) will be made available to the financial press for publication and will be posted on the company’s Web site.

Middlefield will continue to publish daily NAV’s for its open-end funds.