Arista Networks Inc. (ANET)

The deal drives home the importance of cutting-edge optical component and module technology to networking hardware vendors. It also might strengthen Cisco's sales pitch to cloud giants.

These top picks rose between 22% and 55% in the first half of 2019.

The data center switch supplier still has strong long-term growth drivers. But it could see more profit-taking following a weak Q2 outlook blamed on softening cloud demand.

The big portfolio managers get ahead of the turn in cycles -- as we can see in oil services, semiconductors and autos, among other sectors. Here's how to play their game.

"We are still perceived as just a hardware company and that's not true," Robbiati said.

Though there's a pocket or two of softness, cloud capex growth remains pretty strong overall.

Some tech giants are growing their cloud investments a lot faster than others. Video needs often have something to do with it.

The types of switches that Amazon reportedly wants to sell to businesses have seen limited enterprise traction to date. However, recent tech trends could make them more popular.

While many traditional enterprise IT giants are contending with weak hardware demand, things look much better for some of their chip and component suppliers.

Though it's getting a boost from buybacks, acquisitions and favorable IT spending trends, the networking giant only slightly beat estimates and offered in-line guidance.

Many large businesses are now opting to shut down existing data centers and move their contents to public clouds. Amazon is well-positioned to grab a large portion of these deals.

The big change in the stock market Tuesday is leadership, but a strong close is still needed.

This earnings season is already showing that capital spending from cloud giants remains far stronger than spending from traditional carriers. That affects quite a few hardware and chip firms.

In 30 years of conducting this survey, no other sector has been as consistently popular as technology.

There is still a very strong appetite for individual stocks with momentum.

No one can argue the market doesn't need rest and consolidation, but how that happens is a key question.

I don't think this speculative trading run is over, however.

ANET is likely to have either a sideways correction -- or a sideways-to-lower correction.

It's the season for fund managers to buy the anointed stocks.

With the former Cisco CEO set to step down as chairman, the path is clear for his successor to make big acquisitions and other moves to overhaul Cisco's strategy and culture.

Friday morning bounce shows little trust as North Korea issue remains unsettled.

Trading is duller than usual right now.

On the whole, tech stocks had a solid earnings season. But many richly-valued names sputtered despite releasing decent numbers.

The networking giant is forecasting limited sales and earnings growth for the next few years, as hardware pressures offset software and services growth.

Most of these names have exhibited exceptional price strength.