The S&P 500 had a record close on Monday and continued to climb during Tuesday morning trading.

While headlines that the large-cap index has notched a new high have become the norm, some investors may wonder if a pullback is coming.

"The S&P 500 is broken," said Michael DeMassa, who is a certified financial planner and chartered financial analyst, and the founder of Forza Wealth Management in Sarasota, Florida.

Many investors assume investing in the S&P 500 index — through ETF ticker symbols SPY , VOO or IVV — is synonymous with diversification, DeMassa said.

Yet that sense of safety is an illusion, he said, since the market capitalization-weighted index means companies with bigger allocations may drag down the fund if their performance suffers. Or the

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