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.
ETF stands for exchange traded funds. It is a portfolio of  stocks or bonds that is sold to investors on open exchanges. The  investor purchases these shares through a brâ¦oker. ETFs are often  inexpensive and are generally indexed to a particular published  benchmark. They are not mutual funds however. Unlike mutual funds,  when the investor buys a share in an ETF, the portfolio does not  change. The price of the ETF or net asset value (NAV) can be found  throughout the trading day.