Gallery. 1  Hand-cranked planetary sharpener, with cover in place. 2  Hand-cranked planetary sharpener from 1950â60, with cover removed. 3  Hand-cranked planetary sharpener with spring-driven pencil holder. 4  AC-powered electric pencil sharpener. 5  Battery-operated sharpener.
Description. Tracking Error is a measure of how closely an ETF follows its benchmark index. This data point seeks to isolate the ability of the portfolio managers to track the index, ignoring the confounding effects of ETF liquidity on market prices.escription. Tracking Error is a measure of how closely an ETF follows its benchmark index. This data point seeks to isolate the ability of the portfolio managers to track the index, ignoring the confounding effects of ETF liquidity on market prices.
Compared to a synthetic ETF, a physical ETF incurs larger transactional costs because of portfolio rebalancing and tracking errors between the ETF and benchmarks. The Bottom Line Synthetic ETFs can act as a gateway for investors to gain exposure in markets that are hard to access (namely, obscure or less liquid markets). They also come in handy for investors when it's impossible or expensive to buy, hold and sell the underlying investment in some other way.