Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Chinese solar firm Yingli Green Energy (NYSE: YGE) are up 10% today on news that Germany is considering cutting solar subsidies.

So what: A possible feed-in tariff cut could end talk of a hard cap on solar installations, leading to more sales in the region long term. A FIT cut would lead to rampant installations before the cut (possibly in April) and price pressure after the cut, squeezing margins. The trade-off of higher sales and lower margins is apparently one that investors are willing to make.

Now what: The market has applauded this news, pushing the solar sector higher with LDK Solar, JA Solar (Nasdaq: JASO), and SunPower (Nasdaq: SPWRA) climbing alongside Yingli. I am a long-term solar bull, but I don't see this as terribly bullish news for the sector. Firms are weaning themselves off Germany's generous feed-in tariffs, but this brings into question demand for the second half of the year -- a fear that has been weighing on solar stocks. On the positive side, a final FIT answer from Germany would lead to a little more clarity for solar stocks going forward. For now, I'm going to give this news a little time to sink in, thinking that the market will reconsider just how bullish today's news is in the days to come.

Interested in more info on Yingli Green Energy? Add it to your watchlist.

Fool contributor Travis Hoium owns shares of SunPower. You can follow Travis on Twitter at @FlushDrawFool, check out his personal stock holdings, or follow his CAPS picks at TMFFlushDraw.

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