What happened Shares of solar-panel installer Vivint Solar (NYSE: VSLR) are down 6.1% as of 1:10 p.m. EDT -- and no one seems to know why. Although this is earnings season, Vivint hasn't reported any new earnings since March, and isn't expected to do so again until next month. There've been no analyst downgrades, nor even any changes in price target on Wall Street. Really, there's only one thing that seems to have changed -- and it's not Vivint. Image source: Getty Images. So what This morning various outlets began reporting on a shift in pricing strategy at Tesla (NASDAQ: TSLA) -- which (as you may know) produces not just electric cars, but solar panels to power them, and batteries to hold that power. The Verge, for example, reports that Tesla's "online configuration tool" is now showing prices for Tesla-built solar arrays as much as 38% below "the national average, and much less than Tesla charged previously." The website further points out that Tesla has been losing market share to rivals Sunrun and Vivint -- yes, Vivint was named specifically. The implication would seem to be that, by cutting prices, Tesla may end up stealing back market share from Vivint, forcing it to cut prices and earn less -- or both. Now what This is all very hypothetical at this point. What's more, even if Tesla's pricing move does end up hurting Vivint, it's still so new that it's highly unlikely to affect Vivint's results next month at all. And in that regard, it's worth pointing out that analysts are predicting Vivint will reverse last year's losses and report a $0.10-per-share profit for the first quarter. If that happens, you can expect investors will react positively to its return to profitability. Today's share-price weakness, it seems, could be providing investors an opportunity to cash in on any good news we hear next month. 10 stocks we like better than Vivint SolarWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has quadrupled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Vivint Solar wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of March 1, 2019Rich Smith has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Tesla. The Motley Fool has a disclosure policy.Source