ZSTK, operating in its industry, presents challenges in full Shariah compliance assessment due to insufficient financial data for debt and liquidity ratios. The primary issue is an interest income ratio of 5.72%, exceeding the 5% threshold across major standards, necessitating purification. Business activities appear permissible with no identified non-compliant revenue sources. Overall, the stock is non-compliant based on exclusion from all major Shariah indices, though it scores moderately on ratio quality.