# CoastalSouth shares rise on margin gains

> CoastalSouth ($COSO) shares climb as wider net interest margin and buybacks boost value.
- Title: CoastalSouth shares rise on margin gains · TradingView
- Summary: CoastalSouth ($COSO) shares climb as wider net interest margin and buybacks boost value. CoastalSouth Bancshares' net interest margin widened to 3.70% in Q3…
- Keywords: coastalsouth, net interest margin, buybacks, tangible book, securities, nyse, business, finance, shares, rise, margin, gains
- Source: TradingView — https://tradingview.com/chart/COSO/Pd3dMgml-CoastalSouth-COSO-wider-margin-buybacks-cheap-on-book
- Published: 2026-10-21T13:49:57+00:00
- Read time: 1 min
- Topics: coastalsouth, net interest margin, buybacks, tangible book, securities, nyse, business, finance
## CoastalSouth Bancshares
CoastalSouth Bancshares, Inc. is the Atlanta holding company for Coastal States Bank with 12 branches in South Carolina Lowcountry, Savannah and metro Atlanta.
## Wider net interest margin
Net interest margin widened to 3.70% in Q3 2025 from 3.58% a year earlier, as deposit costs fell to 2.48% from 2.72%.
## Buybacks and dividends
Since its $15M buyback started in May, CoastalSouth has bought 2.8% of its stock, and the quarterly dividend increased to $0.06 from $0.05.
## Cheap on book
At the 20 October close, shares traded at 1.24 times tangible book of $21.90 and about 11 times earnings.
## Key takeaway

CoastalSouth Bancshares' net interest margin widened to 3.70% in Q3 2025, driving stock price up despite recent loan-loss reserve releases.