The Warsaw Stock Exchange's blue-chip WIG20 index rose by 2.33 percent on Thursday, the highest increase since November, reported Parkiet. At one point during the session, the index had even gained 3.3 percent.

The gains were largely the result of news that ratings agency Fitch could increase Poland's credit rating. Another factor impacting the markets was positive news from the US, where better financial results from listed companies, as well as an increase in demand for durable goods, were recorded.

The US Federal Reserve's declaration that it would maintain interest rates at close to zero until the end of 2014 also generated confidence.

The Warsaw Stock Exchange recorded big gains, keeping pace with Western markets where moods were also positive. Small companies also enjoyed gains, with the WIG80 index rising 1.7 percent.

The Polish currency also strengthened on Thursday, gaining 1 percent against the euro and almost 2 percent against the dollar.

Poland A.M.