TLT (from ishares) is an ETF that tracks long term treasury bonds... maybe that's what youre looking for??
Stocks are equity in a company. I'm no accountant but I think that.... Assets = Equity(stocks) + Liability (bonds). As @Jrich pointed out the TLT is an Exchange Traded Fund (ETF) that is commonly followed, but there are many, many others...just google "treasury ETF" Oh, but maybe you mean stocks that are "sensitive" to treasury yields, like the real estate REITs....okay....like Chimera (can't remember the symbol).
I would suggest using the FINVIZ screener and selecting the "Financial" sector and try a few of the "REIT" industries.