Investors in the northern Gulf state joined the slight regional upswing on Thursday and lifted the Kuwait Stock Exchange (KSE) Market Index by 0.36% to 6,733.50 points. Bank stocks in particular helped the market in regaining some territory, as the KSE lost 1.13% during the first trading week in June. The financial industry's bellwether National Bank of Kuwait (NBK) added 1.69%, closing at KD1.20. Banks performed stronger after China's largest bank ICBC said it looks at acquisitions in Kuwait and Saudi Arabia, Thomson-Reuters reported.