I think gold is overvalued compare to silver, or silver is undervalued. Historical silver to gold ratio is 25 to 1, now it hovers around 75 to 1 or 85 to 1.
So silver should be 3 times more expensive. I agree that banks have repatriating gold. Germany from US, Texas Retirement system from bank of New York. I cannot really see gold being worth 1/3 of what it is now, so silver has to be undervalued.
While both metals are used in industry and jewelry, silver is by far used more in industrial/technological applications than gold is, so if there was any shortage whatsoever, it would be widely known, and be reflected in it's price, (as per the law of supply & demand) yet, it's price is a fraction of what it's been in recent years. And, there's no real motivation for anyone (other than the mining operations) to downwardly manipulate the silver price, like there is for gold. Unlike gold, no one is stock piling silver as part of their national reserves (which would also be noticed by the market, and predictably result in a price hike).
Also,the historical ratio is really nothing but a number, there's no reason the two metals have to conform to any value ratio. It's largely used as a value gauge by investors: when the ratio shifts one way, divest in one metal and buy the other. When it shifts the other way, sell that metal, and buy the other. Wash,rinse, repeat. According to the formula, now is the time to divest in gold, and pick up silver (assuming you believe the historical ratio is ever coming back, that is. I'm kinda skeptical ).
Other than that, it's basically meaningless, especially in times like these where so many of the other hard-fast financial rules seem to have been tossed out the window (for example, how did we not see rampant inflation after the trillion dollar printing extravaganza of 2009, as so many economists expected, and as was the historical norm?)
But, I tend to agree that silver is undervalued, but that's partly because gold still is too. If gold was $2500 oz, and silver was $100, where do you think individuals, corporations, and even nations, would be investing their capital ? It sure wouldn't be in the US Dollar and US Treasuries!! The cat would be out of the proverbial bag, as far as the world's mortally wounded fiat currencies go. And that's something they can not, and will not allow.
And there's the motivation for the powers-that-be to constantly deride metals, and for them to artificially depress their values (and again, gold more than silver).