Singapore's investments in global banks

I received a report from an analyst.

Temasek and GIC invested a total of SGD 36.7 billion in the global banks, namely Barclays, UBS, Merrill Lynch and Citigroup. The invstment in Barclays was made 18 months ago. The others was made nearly 12 months ago.

The value of these investments dropped by slightly more than 50%, or about SGD 18.5 billion. During the same period, the global stockmarket dropped by about the same extent. (Earlier, I thought that the global banks performed worse that the market, but it does not seem to be the case).