DA Davidson analyst Mark Kelleher lowered his price target on A10 Networks (ATEN) to $8 from $9 but kept his Buy rating after the company's preliminary Q4 results lowering expectations for sales. The analyst says the company "may have been caught in 4Q by weakness in the Service Provider sector" - similarly to NetScout (NTCT) - but believes the weakness may be temporary. Longer term, Kelleher notes that A10 Networks offers "unique solutions in the cyber security market, particularly with the DDoS threat vector" and can achieve profitable growth in 2018 and beyond.