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.
let s go over these attractive features for a background on what etfs are and how they work check out introduction to exchange traded funds the benefits of trading like a stock the easiest way to highlight the advantage of the etf trading like a stock is to compare it to the trading of a mutual fund mutual funds are priced once per day at the close of business everyone purchasing the fund that day gets the same price regardless of the time of day their purchase was made