MainStreet Bancshares (MNSB) Soars 5.4%: Is Further Upside Left in the Stock? Posted byZacks Equity Research September 28, 2021 Leave a comment on MainStreet Bancshares (MNSB) Soars 5.4%: Is Further Upside Left in the Stock? MainStreet Bancshares (MNSB) was a big mover last session on higher-than-average trading volume. The latest trend in earnings estimate revisions might…