No, this is wrong for what people said about causes of investment. It said how investment changed between 2008 to 2013, not whether it increased or decreased. My teacher always said do more points than what was stated, and I did 3 points. I talked mainly however about why investment decreased - e.g. due to interest rates and confidence levels. On the other hand I gave a statement and explanation about why investment increased as it did. It did not specify therefore one can not assume that it is based entirely on 2008 to 2013. Remember the word was "BETWEEN", and investment fluctuated.
Don't worry, you will get the marks if you talked about both. I've confirmed it with quite a few teachers. Also, to maximize marks, even when it said "Analyse 2 reasons". If you did 4 and explain, examiners will mark the 2 best explanations you gave.
Overall, it was a good paper, in my opinion. Now can you please stfu about economics, its done!