Both in Semiconductor Manufacturing Equipment

Energy Recovery vs Amtech Systems

Over the past year ERII returned −57.3% and ASYS returned +63.9%; their daily moves had a correlation of 0.12.

ERII −57.3% ASYS +63.9%Growth of $1, one year, split-adjusted
MetricERIIASYS
Price$7.17$12.80
Market cap$366.0M$224.1M
Today−0.14%+3.90%
1 month+5.0%−28.2%
6 months−36.6%−28.6%
Year to date−46.8%+2.0%
1 year−58.1%+61.4%
Revenue growth (YoY)−57.2%+14.5%
Gross margin74.7%50.0%
Net margin−26.7%7.4%
P/E (TTM)23.9×56.0×
Price / sales3.0×2.7×
Net cash$93.1M$82.9M
Dividend yield——
Volatility (60d)33.6%66.4%
Short % of float6.4%11.8%
Next earnings——

Shading marks the stronger figure where one clearly exists (lower is better for valuation and volatility).