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.
Exchange traded funds (ETFs) are uniquely structured investment products that track indexes, or baskets of assets, including stocks, bonds, currencies, real estate and commodities. Because ETFs can cover a broad range of assets, they offer investors diversity from a single investment. When you purchase ETF shares, you are buying shares of a portfolio that tracks the yield and performance of its underlying asset(s). Like stocks, ETFs can be purchased on margin and sold short, and prices fluctuate throughout each trading session as shares are bought and sold on various exchanges.