The reason you see the so called drop in value is due to approximately 14 dollar dividend paid in December. If you bought shares in december, you also bought the dividend and must pay taxes on it unless it is in an IRA or some tax exempt retirement status. This fund has been a favorite of mine (as well jornx.
I wish the agencies reporting the data would take the true value into account. I split my janus holdings into jornx and javtx. 50/50 Larry