Shenzhen iN-Cube Automation's declining ROCE trend is concerning. Despite reinvestment in its business, shrinking returns and flat total shareholder return over the past year are not typical of multi-baggers. It might be better to seek investment opportunities elsewhere.

Market optimism retains high P/S ratio for underperforming firm, expecting industry-beating future performance. Investors risk overpaying for stock if this doesn't occur. A P/S ratio decline aligned with recent growth could cause shareholder disappointment.

Investors are bullish about Guangzhou Frontop Digital Creative Technology despite its recent revenue decline. However, underperformance may sour sentiment and decrease the stock's P/S ratio, putting shareholders' investments at risk.