Crude oil prices fell off a cliff on Thursday, as the energy commodity slumped more than 3% to settle under $75 per barrel. The recent slump in energy prices is welcomed by consumers, who will have more spending money lining their pockets this holiday season.

But the falling price of oil doesn’t lift all stocks, so to speak. First Solar, Inc. (FSLR), Transocean LTD (RIG) and Schlumberger Limited. (SLB) finished as three of today’s worst performing stocks.

First Solar (FSLR)

Investing in solar energy isn’t for the faint of heart. Anyone who owns FSLR stock probably knows that already, since shares in the solar panel and power company are about 80% more volatile than the stock market as a whole based on the beta of 1.85 for First solar stock. After today’s 4% selloff, FSLR is off about 13% so far in 2014.

Shares of First Solar are struggling again today after one of the competitors in the industry, Canadian Solar Inc. (CSIQ), gave weak forward guidance yesterday. Canadian Solar expects sales of $925 million to $975 million in the current quarter, meaning CSIQ will almost certainly miss the $977 million Wall Street was looking for. That doesn’t bode well for FSLR’s numbers, and shares are selling off in sympathy.

Transocean (RIG)

Shares of offshore oil driller Transocean were also off notably on Thursday, slumping 2.9% in trade. RIG stock’s decline today can be directly linked to the falling price of oil. As prices fall, the prospect of renting a rig to drill for oil becomes less economically alluring.

Deepwaters drillers like RIG are particularly at risk in this environment of falling oil prices, given the relatively expensive nature of offshore oil rigs vs. onshore options. The more expensive oil is, the more profit there is in deepwater operations … and as oil falls, Transocean business falls, too.

Schlumberger (SLB)

SLB stock slumped almost 3%, also on disappointing oil pricing. However, it’s worth noting that some investors are eyeing the energy sector as a good place to bargain-hunt right now.

If you’re the kind of brave soul who isn’t afraid of the pullback and wants to swoop in to buy on a dip, InvestorPlace editor Jeff Reeves recently highlighted 5 oil stocks to buy now — and Schlumberger is one of them.

More From InvestorPlace

• 3 Chinese Stocks Riding High on Earnings
• 2015′s Best Cheap Stocks to Buy Now
• 4 YHOO M&A Deals With Big Potential

As of this writing, John Divine did not hold a position in any of the aforementioned securities. You can follow him on Twitter at @divinebizkid.