FuelCell Energy, Inc. (FCEL)

The speculative runup in FCEL seems to be over. Approach with caution.

Buying PLUG because it's a green energy name is not a good enough reason. Until we know more, this name is purely speculative.

Here's a trade in one of my favorites.

High valuations, margin debt and the ARK effect could lead to more pain for some names. But the selloff could also create buying opportunities in other tech companies.

One possible outcome: The party ends relatively soon for some of the more speculative names, while other high-multiple stocks remain strong until inflation and the Fed become issues.

The Russell 2000 has now soared 16% year to date, nearly twice the Nasdaq Composite's 8.5% move.

To navigate this market effectively you have to keep looking at leading sectors and themes and watch where the money is rotating.

FCEL pretty consistently sees its strong moves fade over a couple of days.

There's no quit in PLUG, a leader in building out the 'hydrogen' economy.

The environment for these firms is not only friendlier at the federal level, but far friendlier at the corporate and investment levels.

Do you hear what I hear? Check the guy on your left. Check the gal on your right. Check the house across the street. They may need something that you can provide.

This note does not accurately represent how ticked off I feel about what's included and not included in the current stimulus bill.

What we have seen, in addition to the pullbacks, are management teams taking advantage of the huge moves higher.

From nuclear to geothermal, there is upside potential for those willing to take a contrarian stance.

The Federal Reserve seems to be ready for an interest rate hike this week.

TheStreet's Jim Cramer answers Twitter questions on American Airlines (AAL), Vale (VALE), FuelCell (FCEL) and Apple (AAPL).

For the week of June 8, we await earnings reports from Lululemon Athletica (LULU), Burlington Stores (BURL), Men's Wearhouse (MW), Box Inc (BOX) and Restoration Hardware (RH).

While there are several different types of solar stocks, Dan Dicker, Energy contributor at TheStreet.com, maintains that they all are beholden to the prices of fossil fuels.

Wait for a sign of weakness before going short.

We keep an eye on Chinese e-commerce giant, Alibaba Group (BABA) as it kicks off a global roadshow in New York ahead of its initial public offering.

TD Ameritrade's Chief Strategist JJ Kinahan explains technology and healthcare sectors were a popular buy, while consumer stocks were net sold, with Apple leading the way.

Endlessly chasing strength may seem brainless, but it works.

Approach fuel cell stocks without emotion or bias.

If they're renters, they can hurt you, and if they're owners, they can help.

TheStreet's Jim Cramer is worried Bill Ackman will not stop at trying to take down Herbalife, despite the company's planned changes to its board.

Just like the tourney, you have to check emotion at the door.

Monday's rally appears to have little room to run.

Let's do a deep dive to understand this kind of rally.