title: How to get ETF Financial information (e.g. NAV) from Yahoo (with Quantmod)?
body: <p>I know that I can use the <code>quantmod</code> package to get stock financial information easily from yahoo. For example, if I want to get the Volume, P/E ratio and Dividend Yield: </p>
  
  <pre><code>&gt; library(quantmod)
  &gt; AAPL &lt;- getSymbols("AAPL")
  Warning message:
  In download.file(paste(yahoo.URL, "s=", Symbols.name, "&amp;a=", from.m,  :
    downloaded length 167808 != reported length 200
  &gt; what_metrics &lt;- yahooQF(c("Name",
  +                    "Volume", 
  +                    "P/E Ratio",
  +                    "Dividend Yield"
  +                    
  + ))
  &gt; 
  &gt; getQuote(AAPL, what=what_metrics)
                Trade Time       Name   Volume P/E Ratio Dividend Yield
  AAPL 2016-03-02 04:00:00 Apple Inc. 33143834     10.72           2.15
  &gt; 
  &gt; 
  &gt; yahooQF()
  
   1:   Ask                                                        2:   Average Daily Volume                                    
   3:   Ask Size                                                   4:   Bid                                                     
   5:   Ask (Real-time)                                            6:   Bid (Real-time)                                         
   7:   Book Value                                                 8:   Bid Size                                                
   9:   Change &amp; Percent Change                                   10:   Change                                                  
  11:   Commission                                                12:   Change (Real-time)                                      
  13:   After Hours Change (Real-time)                            14:   Dividend/Share                                          
  15:   Last Trade Date                                           16:   Trade Date                                              
  17:   Earnings/Share                                            18:   Error Indication (returned for symbol changed / invalid)
  19:   EPS Estimate Current Year                                 20:   EPS Estimate Next Year                                  
  21:   EPS Estimate Next Quarter                                 22:   Float Shares                                            
  23:   Days Low                                                  24:   Days High                                               
  25:   52-week Low                                               26:   52-week High                                            
  27:   Holdings Gain Percent                                     28:   Annualized Gain                                         
  29:   Holdings Gain                                             30:   Holdings Gain Percent (Real-time)                       
  31:   Holdings Gain (Real-time)                                 32:   More Info                                               
  33:   Order Book (Real-time)                                    34:   Market Capitalization                                   
  35:   Market Cap (Real-time)                                    36:   EBITDA                                                  
  37:   Change From 52-week Low                                   38:   Percent Change From 52-week Low                         
  39:   Last Trade (Real-time) With Time                          40:   Change Percent (Real-time)                              
  41:   Last Trade Size                                           42:   Change From 52-week High                                
  43:   Percent Change From 52-week High                          44:   Last Trade (With Time)                                  
  45:   Last Trade (Price Only)                                   46:   High Limit                                              
  47:   Low Limit                                                 48:   Days Range                                              
  49:   Days Range (Real-time)                                    50:   50-day Moving Average                                   
  51:   200-day Moving Average                                    52:   Change From 200-day Moving Average                      
  53:   Percent Change From 200-day Moving Average                54:   Change From 50-day Moving Average                       
  55:   Percent Change From 50-day Moving Average                 56:   Name                                                    
  57:   Notes                                                     58:   Open                                                    
  59:   Previous Close                                            60:   Price Paid                                              
  61:   Change in Percent                                         62:   Price/Sales                                             
  63:   Price/Book                                                64:   Ex-Dividend Date                                        
  65:   P/E Ratio                                                 66:   Dividend Pay Date                                       
  67:   P/E Ratio (Real-time)                                     68:   PEG Ratio                                               
  69:   Price/EPS Estimate Current Year                           70:   Price/EPS Estimate Next Year                            
  71:   Symbol                                                    72:   Shares Owned                                            
  73:   Short Ratio                                               74:   Last Trade Time                                         
  75:   Trade Links                                               76:   Ticker Trend                                            
  77:   1 yr Target Price                                         78:   Volume                                                  
  79:   Holdings Value                                            80:   Holdings Value (Real-time)                              
  81:   52-week Range                                             82:   Days Value Change                                       
  83:   Days Value Change (Real-time)                             84:   Stock Exchange                                          
  85:   Dividend Yield           
  </code></pre>
  
  <p>Is there a similar method for downloading Financial information specific for ETFs  (using yahoo or any other sources) ? </p>
  
  <p>For example, how can I download the NAV or Net Asset for QQQ (an ETF fund)? 
  There are no NAV for <code>yahooQF</code></p>
  
  <p>Thanks in advance </p>