There is a little bit of disagreement with your take on SLW. Today gold did MUCH better than silver. The following are possible reasons you might take exception to.
On the one hand banks are participating to the upside today in the gold sector. But on the other hand they may be suppressing silver. The reason for this is that silver is very bulky. Also if too many people acquire silver as insurance the banksters and their elitist backers will become marginalized as they will no longer be able to control populations as in the past. Central bankster perfidy could account for silver’s relative lack-luster performance.
Another reason could be the revelations about the difficulties with the Pascua Llama project in South America, which SLW has been part of because of its portion of mine output through Barrick. It has been said that SLW could share in some of the legal liability there as a participant that knew of the alleged mining claim fraud. Whatever the case may be both silver and SLW was much less prominent in today’s PM sector gains. Some analysts claim that gains in silver are a harbinger of gains in gold. That certainly wasn’t the case today, or in the recent past. See the goldprice website to observe that the gold/silver ratio is still increasing and is currently over 65. The rate of change is decreasing however.
Gains were "guesstimated" (wrongly). Actually gold gained a little over 3% while silver gained over 5%. Gold mining sector gains were pretty much equal to that of SLW. This could mean that SLW is waiting to pop further. Time will tell.