Hyperscale Data Inc.

(AMEX:GPUS) stock surged in Monday premarket trading as improving risk appetite and a stronger broader market fueled buying in speculative small-cap stocks.

The stock climbed as Nasdaq futures advanced 1.70% and S&P 500 futures gained 0.87%, supporting demand for higher-risk names ahead of the opening bell.

No company-specific announcement appeared to be driving the rally.

Instead, the move reflected a momentum-driven rebound in a low-priced stock, where relatively modest buying activity can produce sharp percentage gains.