ATTN: $SPX
Interesting chart from BofA:

5 largest stocks % of S&amp;P 500

🚨 Now the most TOP HEAVY since internet bubble times🚨 

So when you buy this as an index tracker your investment is very concentrated &amp; sensitive to these stocks.

@StockCats @jedimarkus77 @LongTplexTrader https://t.co/jn1ryrktOy