nearnorth101You can learn more than I know by reading through some of the posts here and by visiting the company's web site.
SST.v basically buys current and future by-product silver production from base metal miners. The price structure for its purchases is substantially below current prices. SST achieves this discount by prepaying for the silver through the issuance of shares to the miner from whom it buys the silver and advancing them cash.
The structure of the company's business is similar to SLW's. It is has been suggested with good reason that SST is undervalued relative to SLW. That's why I own it rather than SLW, though I have and likely will hold both...