But Knot warned individual investors against joining the recent rallies in companies such as GameStop GME.N. Adds remark on interest rates and economic outlook AMSTERDAM, Jan 31 (Reuters) - The continuing rise of stock markets worldwide could be the result of growing hopes of economic recovery, and does not necessarily mean that prices are overly inflated, European Central Bank governing council member Klaas Knot said on Sunday. Knot said earlier this week that the ECB still had room to cut interest rates if the economic recovery proves too slow to keep its inflation target in sight.